Tootfinder

This https://arxiv.org/abs/2401.02260 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Phase space path integral approach to the kinetics of black hole phase transition
We employ the approach of path integral in the phase space to study the kinetics of state switching associated with black hole phase transitions. Under the assumption that the state switching process of the black hole is described by the stochastic Langevin equation based on the free energy landscape, we derived the Martin-Siggia-Rose-Janssen-de Dominicis (MSRJD) functional and obtained the path integral expression of the transition probability. The MSRJD functional inherently represents the pa…

Rare events, time crystals and symmetry-breaking dynamical phase transitions
Rub\'en Hurtado-Guti\'errez
https://arxiv.org/abs/2404.04135 https://<…

Rare events, time crystals and symmetry-breaking dynamical phase transitions
In this PhD thesis, I investigate the properties of symmetry-breaking dynamical phase transitions that manifest in the fluctuations of time-integrated observables within classical systems. In particular, I analyze how these phase transitions impose stringent constraints on the structure of the eigenvectors of the system dynamical generator of the dynamics. Additionally, I identify a dynamical phase transition to a time-crystal phase in a model of driven-diffusive lattice gas. The study of this …

Dark matter phenomenology and phase transition dynamics of the next to minimal composite Higgs model with dilaton
Borui Zhang, Zhao Zhang, Chengfeng Cai, Hong-Hao Zhang
https://arxiv.org/abs/2404.05332

Dark matter phenomenology and phase transition dynamics of the next to minimal composite Higgs model with dilaton
In this paper, we conduct a comprehensive study of the Next-to-Minimal Composite Higgs Model (NMCHM) extended with a dilaton field $χ$ (denoted as NMCHM$_χ$). A pseudo-Nambu-Goldstone boson (pNGB) $η$, resulting from the SO(6)$\to$SO(5) breaking, serves as a dark matter (DM) candidate. The inclusion of the dilaton field is helpful for evading the stringent constraints from dark matter direct detection, as it allows for an accidental cancellation between the amplitudes of DM-nucleon scatterin…

This https://arxiv.org/abs/2403.01576 has been replaced.
link: https://scholar.google.com/scholar?q=a

Gapless Edge-Modes and Topology in the Qi-Wu-Zhang Model: A Real-Space Analysis
The topological phase transition in the Qi-Wu-Zhang model is studied, with particular attention to the appearance of chiral edge-modes in the nontrivial phase. Time-reversal symmetry breaking and its role in the topological phase transition is explicitly demonstrated. An effective Hamiltonian for the topologically protected edge-modes in a finite-size system is developed. The topological phase transition is understood in terms of a global perturbation to the system which lifts the degeneracy of…

This https://arxiv.org/abs/2402.07856 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

The Phase Transition of $4D$ Yang-Mills Charged GB AdS Black Hole with Cloud of Strings
In this paper, we present an exact spherically symmetric and Yang-Mills charged AdS black hole solution in the context of $4D$ Einstein-Gauss-Bonnet (EGB) gravity in the presence of a cloud of strings. Thermodynamics of this solution is studied. The critical behavior, the types of phase transitions in canonical ensemble, the Joule-Thomson expansion, the Clapeyron equation and the critical exponents shall be investigated.

The Phase Transition of Reissner-Nordstr\"om Black Holes
Bobin Li
https://arxiv.org/abs/2405.04543 https://arxiv.org/pdf/2405.04…

The Phase Transition of Reissner-Nordström Black Holes
Under the framework of thermodynamics, the phase transition of the black hole is a general issue in general relativity. In this work, the phase transition of charged black holes is discussed carefully. The metric tensor of thermodynamics is redefined in the charged black hole, based on the Ruppeiner geometry. With the well-defined metric tensor of thermodynamics, the scalar curvature of the charged black hole is obtained. It is indicated that the scalar curvature is diverged and infinite when t…

Spectral Phase Transition and Optimal PCA in Block-Structured Spiked models
Pierre Mergny, Justin Ko, Florent Krzakala
https://arxiv.org/abs/2403.03695 htt…

Spectral Phase Transition and Optimal PCA in Block-Structured Spiked models
We discuss the inhomogeneous spiked Wigner model, a theoretical framework recently introduced to study structured noise in various learning scenarios, through the prism of random matrix theory, with a specific focus on its spectral properties. Our primary objective is to find an optimal spectral method and to extend the celebrated \cite{BBP} (BBP) phase transition criterion -- well-known in the homogeneous case -- to our inhomogeneous, block-structured, Wigner model. We provide a thorough rigor…

On phase transitions during collisions near the horizon of black holes
A. A. Grib, Yu. V. Pavlov
https://arxiv.org/abs/2403.04695 https://

On phase transitions during collisions near the horizon of black holes
During particle collisions in the vicinity of the horizon of black holes, it is possible to achieve energies and temperatures corresponding to phase transitions in particle physics. It is shown that the sizes of the regions of the new phase are of the order of the Compton length for the corresponding mass scale. The lifetime is also on the order of the Compton time. It is shown that the inverse influence of the energy density in the electro-weak phase transition in collisions on the space-time …

Three-dimensional hidden phase probed by in-plane magnetotransport in kagome metal CsV3Sb5 thin flakes
Xinjian Wei, Congkuan Tian, Hang Cui, Yuxin Zhai, Yongkai Li, Shaobo Liu, Yuanjun Song, Ya Feng, Miaoling Huang, Zhiwei Wang, Yi Liu, Qihua Xiong, Yugui Yao, X. C. Xie, Jian-Hao Chen
https://arxiv.org/abs/2405.04059

Three-dimensional hidden phase probed by in-plane magnetotransport in kagome metal CsV3Sb5 thin flakes
Transition metal compounds with kagome structure have been found to exhibit a variety of exotic structural, electronic, and magnetic orders. These orders are competing with energies very close to each other, resulting in complex phase transitions. Some of the phases are easily observable, such as the charge density wave (CDW) and the superconducting phase, while others are more challenging to identify and characterize. Here we present magneto-transport evidence of a new phase below ~35 K in the…

This https://arxiv.org/abs/2311.12619 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Two-dimensional symmetry-protected topological phases and transitions in open quantum systems
We investigate the influence of local decoherence on a symmetry-protected topological (SPT) phase of the two-dimensional (2D) cluster state. Mapping the 2D cluster state under decoherence to a classical spin model, we show a topological phase transition of a $\mathbb{Z}_2^{(0)}\times\mathbb{Z}_{2}^{(1)}$ SPT phase into the trivial phase occurring at a finite decoherence strength. To characterize the phase transition, we employ three distinct diagnostic methods, namely, the relative entropy betw…

Algebraic localization-delocalization phase transition in moving potential wells on a lattice
Stefano Longhi
https://arxiv.org/abs/2404.03993 https://

Algebraic localization-delocalization phase transition in moving potential wells on a lattice
The localization and scattering properties of potential wells or barriers uniformly moving on a lattice are strongly dependent on the drift velocity owing to violation of the Galilean invariance of the discrete Schrödinger equation. Here a type of localization-delocalization phase transition of algebraic type is unravelled, which does not require any kind of disorder and arises when a power-law potential well drifts fast on a lattice. While for an algebraic exponent $α$ lower than the critica…

Isomorphisms between random $d$-hypergraphs
Th\'eo Lenoir
https://arxiv.org/abs/2405.04670 https://arxiv.org/pdf/2405.04670

Isomorphisms between random $d$-hypergraphs
We characterize the size of the largest common induced subgraph of two independent random uniform $d$-hypergraphs of different sizes with $d\geq 3$. More precisely, its distribution is asymptotically concentrated on two points, and we obtain as a consequence a phase transition for the inclusion of the smallest hypergraph in the largest one. This generalizes to uniform random $d$-hypergraphs the results of Chatterjee and Diaconis for uniform random graphs. Our proofs rely on the first and seco…

Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2
Ryunosuke Shimada, Yuto Watanabe, Lorenzo Tortora, Giovanni Tomassucci, Muammer Yasin Hacisaliho\v{g}lu, Hiroto Arima, Aichi Yamashita, Akira Miura, Chikako Moriyoshi, Naurang L. Saini, Yoshikazu Mizuguchi
https://arxiv.org/a…

Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2
CuAl2-type transition-metal (Tr) zirconides are superconductor family, and the Tr-site element substitution largely modifies its transition temperature (Tc). Here, we synthesized polycrystalline samples of Fe1-xNixZr2 by arc melting. From magnetic susceptibility measurements, bulk superconductivity was observed for 0.4 <= x <= 0.8, and the highest Tc of 2.8 K was observed for x = 0.6. The obtained superconductivity phase diagram exhibits dome-shaped trend, which is similar to unconventional sup…

This https://arxiv.org/abs/2212.12919 has been replaced.
link: https://scholar.google.com/scholar?q=a

Scalar Curvature of the Quantum Exponential Family for the Transverse-Field Ising Model and the Quantum Phase Transition
Unlike for classical many-body systems, the scalar curvature of the exponential family for quantum many-body systems has been not so investigated, and its physical meaning remains unclear. In this paper, we analytically study the scalar curvature of the space of Gibbs thermal states, belonging to the quantum exponential family, equipped with the Bogoliubov-Kubo-Mori metric for the zero- and one-dimensional transverse-field Ising model at low and high temperatures. We find that these scalar curv…

Pressure tuning of hydrogen bond ordering in the metal-organic framework [(CH3)2NH2]Mn(HCOO)3
Na Su, Yinina Ma, Shuang Liu, Wei Wu, Jianlin Luo, Young Sun
https://arxiv.org/abs/2403.04241

Pressure tuning of hydrogen bond ordering in the metal-organic framework [(CH3)2NH2]Mn(HCOO)3
The influence of pressure on the hydrogen bond ordering in the perovskite metal-organic framework [(CH3)2NH2]Mn(HCOO)3 has been investigated by dielectric, pyroelectric adn magnetic measurements in a piston-cylinder cell. Under ambient pressure the ordering of hydrogen bonds takes place at TC = 188 K and induces a first-order ferroelectric phase transition. With increasing pressure to p = 3.92 kbar, the order-disorder transition shifts to a lower temperature and retains the first-order ferroele…

Macroscopic flow out of a segment for Activated Random Walks in dimension 1
Forien Nicolas
https://arxiv.org/abs/2405.04510 https://a…

Macroscopic flow out of a segment for Activated Random Walks in dimension 1
Activated Random Walk is a system of interacting particles which presents a phase transition and a conjectured phenomenon of self-organized criticality. In this note, we prove that, in dimension 1, in the supercritical case, when a segment is stabilized with particles being killed when they jump out of the segment, a positive fraction of the particles exits the segment with positive probability. This was already known to be a sufficient condition for being in the active phase of the model, an…

Spectral Phase Transition and Optimal PCA in Block-Structured Spiked models
Pierre Mergny, Justin Ko, Florent Krzakala
https://arxiv.org/abs/2403.03695 htt…

Spectral Phase Transition and Optimal PCA in Block-Structured Spiked models
We discuss the inhomogeneous spiked Wigner model, a theoretical framework recently introduced to study structured noise in various learning scenarios, through the prism of random matrix theory, with a specific focus on its spectral properties. Our primary objective is to find an optimal spectral method and to extend the celebrated \cite{BBP} (BBP) phase transition criterion -- well-known in the homogeneous case -- to our inhomogeneous, block-structured, Wigner model. We provide a thorough rigor…

This https://arxiv.org/abs/2404.05637 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

First-order phase transitions in the cores of neutron stars
I explore various scenarios for the phase transition within neutron-star matter. I do so by generating large model-agnostic ensemble using Gaussian Processes, both with and without explicit inclusion of first-order phase transitions (FOPTs). The ensemble is conditioned with state-of-the-art astrophysical and theoretical inputs in a fully Bayesian approach. I study how the current data affect the posterior probability of the location and the strength of FOPT. I find that the previously observed …

On the Antiferromagnetic$\unicode{x2013}$Ferromagnetic Phase Transition in Pinwheel Artificial Spin Ice
Anders Str{\o}mberg, Einar Digernes, Rajesh Vilas Chopdekar, Jostein Grepstad, Erik Folven
https://arxiv.org/abs/2404.03973

On the Antiferromagnetic$\unicode{x2013}$Ferromagnetic Phase Transition in Pinwheel Artificial Spin Ice
Nanopatterned magnetic thin films offer a platform for exploration of tailored magnetic properties such as emergent long-range order. A prominent example is artificial spin ice (ASI), where an arrangement of nanoscale magnetic elements, acting as macrospins, interact via their dipolar fields. In this study, we discuss the transition from antiferromagnetic (AF) to ferromagnetic (FM) long-range order in a square lattice ASI, as the magnetic elements are gradually rotated through 45° to a "pinwhe…

Transition of type in the von Neumann algebras associated to the Connes-Marcolli $GSp_4$-system
Ismail Abouamal
https://arxiv.org/abs/2403.03932 https://…

Transition of type in the von Neumann algebras associated to the Connes-Marcolli $GSp_4$-system
We study different types of von Neumann algebras arising from the Connes-Marcolli $GSp_4$-system and show that a phase transition occurs at the level of these algebras. More precisely, we show that the type of these algebras transitions from type $I_\infty$ to type $III_1$, with this transition occurring precisely at the inverse temperature $β= 4$.

This https://arxiv.org/abs/1610.09637 has been replaced.
link: https://scholar.google.com/scholar?q=a

Nonequilibrium and nonlinear kinetics as key determinants for bistability in fission yeast G2-M transition
A living cell is an open, nonequilibrium biochemical system where ATP hydrolysis serves as the energy source for a wide range of intracellular processes, possibly including the assurance for decision-making. In the fission yeast cell cycle, the transition from G2 to M phase is driven by the activation of Cdc13/Cdc2 and Cdc25 and the deactivation of Wee1 through phosphorylation-dephosphorylation cycles with feedback loops. Here, we present a kinetic description of the G2-M circuit which reveals …

Nonthermal Heavy Dark Matter from a First-Order Phase Transition
Gian F. Giudice, Hyun Min Lee, Alex Pomarol, Bibhushan Shakya
https://arxiv.org/abs/2403.03252

Nonthermal Heavy Dark Matter from a First-Order Phase Transition
We study nonthermal production of heavy dark matter from the dynamics of the background scalar field during a first-order phase transition, predominantly from bubble collisions. In scenarios where bubble walls achieve runaway behavior and get boosted to very high energies, we find that it is possible to produce dark matter with mass several orders of magnitude above the symmetry breaking scale or the highest temperature ever reached by the thermal plasma. We also demonstrate that the existing f…

This https://arxiv.org/abs/2311.14725 has been replaced.
initial toot: https://mastoxiv.page/@…

Particle density and critical point for studying site percolation by finite size scaling
Machine learning has recently achieved remarkable success in studying phase transitions. It is generally believed that the latent variables of unsupervised learning can capture the information related to phase transitions, which is usually achieved through the so-called order parameter. In most models, for instance the Ising, the order parameters are simply the particle number densities. The percolation, the simplest model which can generate a phase transition, however, has a unique order param…

This https://arxiv.org/abs/2312.05683 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Cosmological FLRW phase transitions and micro-structure under Kaniadakis statistics
This article is devoted to the study of the thermodynamics phase transitions and critical phenomena of an FLRW cosmological model under the so-called Kaniadakis's statistics. The equation of state is derived from the corrected Friedmann field equations and the thermodynamics unified first law. This reveals the existence of non-trivial critical points where a first-order phase transition takes place. The system behaves as an "inverted" van der Waals fluid in this concern. Interestingly, the nume…

This https://arxiv.org/abs/2404.17816 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A broken debris cascade as a possible source of hot dust emission in transitioning planet-forming disks
Planet-forming disks turn from gas-rich, massive disks made of dust and gas into planetary systems containing only small amounts dust produced by collisions between smaller planetary objects like planetesimals, asteroids, or comets. Traditionally we talk about protoplanetary (age $\sim$1 Myr), transitional ($\sim$ 5-10 Myr), and debris disks ($\sim$ 10-hundreds of Myr), even though the overlap between these phases may be relevant. We aim to show that in the transition phase of a disk, when gas …

This https://arxiv.org/abs/2309.13630 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Absence of spin liquid phase in the $J_1-J_2$ Heisenberg model on the square lattice
We perform an in-depth investigation of the phase diagram of the $J_1-J_2$ Heisenberg model on the square lattice. We take advantage of Density Matrix Renormalization Group and Fully-Augmented Matrix Product States methods and reach unprecedented accuracy with large bond dimensions. We utilize excited-level crossing analysis to pinpoint the phase transition points. It was believed before that there exists a narrow spin liquid phase sandwiched by the Néel antiferromagnetic (AFM) and valence bon…

Statistical modeling of equilibrium phase transition in confined fluids
Gunjan Auti, Soumyadeep Paul, Shohei Chiashi, Hirofumi Daiguji
https://arxiv.org/abs/2403.03162

Statistical modeling of equilibrium phase transition in confined fluids
The phase transition of confined fluids in mesoporous materials deviates from that of bulk fluids due to the former's interactions with the surrounding heterogeneous structure. For example, metal-organic frameworks (MOFs) create a strong heterogeneous field, so adsorbed fluids in MOFs have atypical phase characteristics such as capillary condensation and higher-order phase transitions. These characteristics are modeled by decoupling the host-guest and guest-guest interactions as a many-body pro…

This https://arxiv.org/abs/2312.05683 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Cosmological FLRW phase transitions and micro-structure under Kaniadakis statistics
This article is devoted to the study of the thermodynamics phase transitions and critical phenomena of an FLRW cosmological model under the so-called Kaniadakis's statistics. The equation of state is derived from the corrected Friedmann field equations and the thermodynamics unified first law. This reveals the existence of non-trivial critical points where a first-order phase transition takes place. The system behaves as an "inverted" van der Waals fluid in this concern. Interestingly, the nume…

This https://arxiv.org/abs/2312.10350 has been replaced.
link: https://scholar.google.com/scholar?q=a

Continuous Phase Transition in Anyonic-PT Symmetric Systems
We reveal the continuous phase transition in anyonic-PT symmetric systems, contrasting with the discontinuous phase transition corresponding to the discrete (anti-) PT symmetry. The continuous phase transition originates from the continuity of anyonic-PT symmetry. We find there are three information-dynamics patterns for anyonic-PT symmetric systems: damped oscillations with an overall decrease (increase) and asymptotically stable damped oscillations, which are three-fold degenerate and distort…

This https://arxiv.org/abs/2303.11365 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_eco…

Housing Bubbles with Phase Transitions
We analyze equilibrium housing prices in an overlapping generations model with perfect housing and rental markets. The economy exhibits a two-stage phase transition: as the income of home buyers rises, the equilibrium regime changes from fundamental to bubble possibility, where fundamental and bubbly equilibria can coexist. With even higher incomes, fundamental equilibria disappear and housing bubbles become a necessity. Even with low current incomes, housing bubbles may emerge if home buyers h…

This https://arxiv.org/abs/2212.12919 has been replaced.
link: https://scholar.google.com/scholar?q=a

Scalar Curvature of the Quantum Exponential Family for the Transverse-Field Ising Model and the Quantum Phase Transition
Unlike for classical many-body systems, the scalar curvature of the exponential family for quantum many-body systems has been not so investigated, and its physical meaning remains unclear. In this paper, we analytically study the scalar curvature of the space of Gibbs thermal states, belonging to the quantum exponential family, equipped with the Bogoliubov-Kubo-Mori metric for the zero- and one-dimensional transverse-field Ising model at low and high temperatures. We find that these scalar curv…

Nonthermal Heavy Dark Matter from a First-Order Phase Transition
Gian F. Giudice, Hyun Min Lee, Alex Pomarol, Bibhushan Shakya
https://arxiv.org/abs/2403.03252

Nonthermal Heavy Dark Matter from a First-Order Phase Transition
We study nonthermal production of heavy dark matter from the dynamics of the background scalar field during a first-order phase transition, predominantly from bubble collisions. In scenarios where bubble walls achieve runaway behavior and get boosted to very high energies, we find that it is possible to produce dark matter with mass several orders of magnitude above the symmetry breaking scale or the highest temperature ever reached by the thermal plasma. We also demonstrate that the existing f…

Fluctuation-Driven Morphological Patterning: A Novel Approach to Morphogenesis
Oded Agam, Erez Braun
https://arxiv.org/abs/2405.03448 https://

Fluctuation-Driven Morphological Patterning: A Novel Approach to Morphogenesis
Recent experimental investigations into Hydra regeneration revealed a remarkable phenomenon: the morphological transformation of a tissue fragment from the incipient spherical configuration to a tube-like structure - the hallmark of a mature Hydra - has the dynamical characteristics of a first-order phase-transition, with calcium field fluctuations within the tissue playing an essential role. This morphological transition was shown to be generated by activation over an energy barrier within an …

This https://arxiv.org/abs/2404.19558 has been replaced.
initial toot: https://mastoxiv.page/@a…

Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$
We study the phase transition behavior of the ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$ in the paraelectric region. The temperature dependencies of thermal, polar, elastic and dielectric properties indicate the presence of local structures above the paraelectric-ferroelectric transition temperature Tc = 292 K. The non-zero remnant polarization is measured up to a characteristic temperature T* ~350 K, which coincides with the temperature where the dielectric constant deviates from Curie-Weiss la…

Disorder free many-body localization transition in two quasiperiodically coupled Heisenberg spin chains
K. G. S. H. Gunawardana, Bruno Uchoa
https://arxiv.org/abs/2405.04516

Disorder free many-body localization transition in two quasiperiodically coupled Heisenberg spin chains
Disorder free many-body localization (MBL) can occur in interacting systems that can dynamically generate their own disorder. We address the thermal-MBL phase transition of two isotropic Heisenberg spin chains that are quasi-periodically coupled to each other. The spin chains are incommensurate and are coupled through a short range exchange interaction of the $XXZ$ type that decays exponentially with the distance. Using exact diagonalization, matrix product states and density matrix renormaliza…

Odd-parity multipole order in the spin-orbit coupled metallic pyrochlore Pb$_2$Re$_2$O$_{7-\delta}$
Yuki Nakayama, Daigorou Hirai, Hajime Sagayama, Keita Kojima, Naoyuki Katayama, Jannis Lehmann, Ziqian Wang, Naoki Ogawa, Koshi Takenaka
https://arxiv.org/abs/2405.04018

Odd-parity multipole order in the spin-orbit coupled metallic pyrochlore Pb$_2$Re$_2$O$_{7-δ}$
The pyrochlore oxide Pb2Re2O7-δ (PRO) is a candidate spin-orbit-coupled metal (SOCM) that exhibits a structural phase transition with inversion symmetry breaking. In this study, we report the results of detailed X-ray diffraction (XRD) measurements on single crystals of PRO to clarify the crystal structure below the phase transition temperature at Ts = 300 K. In the XRD patterns, a clear peak splitting is observed below Ts, indicating a cubic to tetragonal transition. Based on the group-subgro…

This https://arxiv.org/abs/2308.07534 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Sharp Deconfinement Transition for Potts Lattice Gauge Theory in Codimension Two
In 1983, Aizenman, Chayes, Chayes, Fröhlich, and Russo proved that $2$-dimensional Bernoulli plaquette percolation in $\mathbb{Z}^3$ exhibits a sharp phase transition for the event that a large rectangular loop is "bounded by a surface of plaquettes.'' We extend this result both to $(d-1)$-dimensional plaquette percolation in $\mathbb{Z}^d,$ and to a dependent model of plaquette percolation called the plaquette random-cluster model. As a consequence, we obtain a sharp phase transition for Wils…

Learning in PINNs: Phase transition, total diffusion, and generalization
Sokratis J. Anagnostopoulos, Juan Diego Toscano, Nikolaos Stergiopulos, George Em Karniadakis
https://arxiv.org/abs/2403.18494

Learning in PINNs: Phase transition, total diffusion, and generalization
We investigate the learning dynamics of fully-connected neural networks through the lens of gradient signal-to-noise ratio (SNR), examining the behavior of first-order optimizers like Adam in non-convex objectives. By interpreting the drift/diffusion phases in the information bottleneck theory, focusing on gradient homogeneity, we identify a third phase termed ``total diffusion", characterized by equilibrium in the learning rates and homogeneous gradients. This phase is marked by an abrupt SNR …

This https://arxiv.org/abs/2403.11126 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of diamagnetic strange-metal phase in sulfur-copper codoped lead apatite
By codoping sulfur and copper into lead apatite, the crystal grains are directionally stacked and the room-temperature resistivity is reduced from insulating to $2\times10^{-5}~Ω\cdot$m. The resistance-temperature curve exhibits a nearly linear relationship at low temperature suggesting the presence of strange-metal phase, and a second-order phase transition is then observed at around 230~K during cooling the samples. A possible Meissner effect is present in dc magnetic measurements. Further h…

Reversible single-pulse laser-induced phase change of Sb$_2$S$_3$ thin films: multi-physics modeling and experimental demonstrations
Capucine Laprais, Cl\'ement Zrounba, Julien Bouvier, Nicholas Blanchard, Matthieu Bugnet, Yael Guti\'errez, Saul Vazquez-Miranda, Shirly Espinoza, Peter Thiesen, Romain Bourrellier, Aziz Benamrouche, Nicolas Baboux, Guillaume Saint-Girons, Lotfi Berguiga, S\'ebastien Cueff

Reversible single-pulse laser-induced phase change of Sb$_2$S$_3$ thin films: multi-physics modeling and experimental demonstrations
Phase change materials (PCMs) have gained a tremendous interest as a means to actively tune nanophotonic devices through the large optical modulation produced by their amorphous to crystalline reversible transition. Recently, materials such as Sb$_2$S$_3$ emerged as particularly promising low loss PCMs, with both large refractive index modulations and transparency in the visible and NIR. Controlling the local and reversible phase transition in this material is of major importance for future app…

A Swarm Coherence Mechanism for Jellyfish
Erik Gengel, Zafrir Kuplik, Dror Angel, Eyal Heifetz
https://arxiv.org/abs/2403.04044 https://

A Swarm Coherence Mechanism for Jellyfish
We present a theory of jellyfish swarm formation and exemplify it with simulations of active Brownian particles. The motivation for our analysis is the phenomenon of jellyfish blooms in the ocean and clustering of jellyfish in tank experiments. We argue that such clusters emerge due to an externally induced phase transition of jellyfish density, such as convergent flows, which is then maintained and amplified by self-induced stimuli. Our study introduces three mechanisms relevant for a better u…

Environmental cosmic acceleration from a phase transition in the dark sector
{\O}yvind Christiansen, Farbod Hassani, David F. Mota
https://arxiv.org/abs/2405.00668

Environmental cosmic acceleration from a phase transition in the dark sector
A new degravitation mechanism within the framework of scalar tensor gravity is proposed. The mechanism eliminates all constant contributions from the potential to the Friedmann equation, leaving only the kinematic and the dynamic terms of the potential to drive cosmic acceleration. We explore a scenario involving a density-triggered phase transition in the late-time universe, and argue that the resulting effective energy density and equation of state parameter can explain late-time cosmology wh…

This https://arxiv.org/abs/2307.04889 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Critical behavior of cascading failures in overloaded networks
While network abrupt breakdowns due to overloads and cascading failures have been studied extensively, the critical exponents and the universality class of such phase transitions have not been discussed. Here, we study breakdowns triggered by failures of links and overloads in networks with a spatial characteristic link length $ζ$. Our results indicate that this abrupt transition has features and critical exponents similar to those of interdependent networks, suggesting that both systems are i…

This https://arxiv.org/abs/2401.02260 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Phase space path integral approach to the kinetics of black hole phase transition
We employ the approach of path integral in the phase space to study the kinetics of state switching associated with black hole phase transitions. Under the assumption that the state switching process of the black hole is described by the stochastic Langevin equation based on the free energy landscape, we derived the Martin-Siggia-Rose-Janssen-de Dominicis (MSRJD) functional and obtained the path integral expression of the transition probability. The MSRJD functional inherently represents the pa…

An insightful report published today by T&E UK on the 'early majority', the next phase of EV buyers, and what's holding them back - and what would convince them (see attached image from the full report).
Research for the UK, but equally applicable elsewhere, I think.

The “early majority”: the next phase of the EV transition in the UK
E UK lays out what the barriers are for the next segment of battery electric vehicle adopters and what can be done to help them make the transition…

This https://arxiv.org/abs/2309.11336 has been replaced.
initial toot: https://mastoxiv.page/@arX…

High-pressure Phase Transition of Olivine-type Mg$_2$GeO$_4$ to a Metastable Forsterite-III type Structure and their Equation of States
Germanates are often used as structural analogs of planetary silicates. We have explored the high-pressure phase relations in Mg$_2$GeO$_4$ using diamond anvil cell experiments combined with synchrotron x-ray diffraction and computations based on density functional theory. Upon room temperature compression, forsterite-type Mg$_2$GeO$_4$ remains stable up to 30 GPa. At higher pressures, a phase transition to a forsterite-III type (Cmc21) structure was observed, which remained stable to the peak …

Revisiting thermodynamic topology of Hawking-Page and Davies type phase transitions
Bidyut Hazarika, Naba Jyoti Gogoi, Prabwal Phukon
https://arxiv.org/abs/2404.02526

Revisiting thermodynamic topology of Hawking-Page and Davies type phase transitions
In this work, we propose a common vector field to study the thermodynamic topology of the Davies type and Hawking-Page phase transitions. Existing literature has shown that studying these two types of phase transitions typically requires defining two separate vector fields . In our approach, we adopt Duan's $ϕ$-mapping topological current theory to define a novel vector field, denoted as $ϕ$, whose critical points exactly correspond to the Davies point and the Hawking-Page phase transition po…

This https://arxiv.org/abs/2312.10790 has been replaced.
link: https://scholar.google.com/scholar?q=a

Surface quantum critical phenomena in disordered Dirac semimetals
We study a non-Anderson disorder driven quantum phase transition in a semi-infinite Dirac semimetal with a flat boundary. The conformally invariant boundary conditions, which include those that are time-reversal invariant, lead to nodal-like surface states on the boundary. In this case the boundary becomes metallic at a critical disorder that is weaker than that for the semimetal-diffusive metal transition in the bulk. The latter transition takes place in the presence of a metallic surface; in …

This https://arxiv.org/abs/2304.13716 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Fermionic skyrmions and bosonization for a Gross-Neveu transition
We investigate a 2+1-D interacting Dirac semimetal with onsite flavor SU(2) symmetry. Topological considerations imply that the skyrmions in the flavor-symmetry-breaking phase carry electron quantum numbers, motivating a dual bosonized low energy description in terms of two complex scalars coupled to an abelian Chern-Simons field. We propose that the transition between a nearby Chern insulator and the flavor symmetry-broken phase is a bicritical point in the bosonized description, and also sugg…

Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions
Marek Lewicki, Marco Merchand, Laura Sagunski, Philipp Schicho, Daniel Schmitt
https://arxiv.org/abs/2403.03769

Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions
Different computational techniques for cosmological phase transition parameters can impact the Gravitational Wave (GW) spectra predicted in a given particle physics model. To scrutinize the importance of this effect, we perform large-scale parameter scans of the dynamical real-singlet extended Standard Model using three perturbative approximations for the effective potential: the $\overline{\rm MS}$ and on-shell schemes at leading order, and three-dimensional thermal effective theory (3D EFT) a…

This https://arxiv.org/abs/2310.03789 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Grokking as a First Order Phase Transition in Two Layer Networks
A key property of deep neural networks (DNNs) is their ability to learn new features during training. This intriguing aspect of deep learning stands out most clearly in recently reported Grokking phenomena. While mainly reflected as a sudden increase in test accuracy, Grokking is also believed to be a beyond lazy-learning/Gaussian Process (GP) phenomenon involving feature learning. Here we apply a recent development in the theory of feature learning, the adaptive kernel approach, to two teacher…

Nernst effect of high-mobility Weyl electrons in NdAlSi enhanced by a Fermi surface nesting instability
Rinsuke Yamada, Takuya Nomoto, Atsushi Miyake, Toshihiro Terakawa, Akiko Kikkawa, Ryotaro Arita, Masashi Tokunaga, Yasujiro Taguchi, Yoshinori Tokura, Max Hirschberger
https://arxiv.org/abs/2404.03762

Nernst effect of high-mobility Weyl electrons in NdAlSi enhanced by a Fermi surface nesting instability
The thermoelectric Nernst effect of solids converts heat flow to beneficial electronic voltages. Here, using a correlated topological semimetal with high carrier mobility $μ$ in presence of magnetic fluctuations, we demonstrate an enhancement of the Nernst effect close to a magnetic phase transition. A magnetic instability in NdAlSi modifies the carrier relaxation time on 'hotspots' in momentum space, causing a strong band filling dependence of $μ$. We quantitatively derive electronic band pa…

This https://arxiv.org/abs/2310.10488 has been replaced.
initial toot: https://mastoxiv.page/@a…

Critical behavior of the dimerized Si(001) surface: Continuous order-disorder phase transition in the two-dimensional Ising universality class
The critical behavior of the order-disorder phase transition in the buckled dimer structure of the Si(001) surface is investigated both theoretically by means of first-principles calculations and experimentally by spot profile analysis low-energy electron diffraction (SPA-LEED). We use density functional theory (DFT) with three different functionals commonly used for Si to determine the coupling constants of an effective lattice Hamiltonian describing the dimer interactions. Experimentally, the…

Gamow-Teller strength distributions of 18O and well-deformed nuclei 24,26Mg by deformed QRPA
Eunja Ha, Myung-Ki Cheoun, H. Sagawa, Gianluca Colo
https://arxiv.org/abs/2404.03884 <…

Gamow-Teller strength distributions of 18O and well-deformed nuclei 24,26Mg by deformed QRPA
We investigate the Gamow-Teller (GT) transition strength distributions of {strongly} deformed nuclei, $^{24,26}$Mg, as well as of $^{18}$O. The calculations are performed within a deformed quasi-particle random phase approximation (DQRPA) which explicitly includes the deformation degree of freedom in the Skyrme-Hartree-Fock (SHF) and RPA calculations. The residual particle-particle ($p-p$) interaction as well as the particle-hole ($p-h$) interaction are extracted from Brückner $G$-matrix calcu…

Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions
Marek Lewicki, Marco Merchand, Laura Sagunski, Philipp Schicho, Daniel Schmitt
https://arxiv.org/abs/2403.03769

Impact of theoretical uncertainties on model parameter reconstruction from GW signals sourced by cosmological phase transitions
Different computational techniques for cosmological phase transition parameters can impact the Gravitational Wave (GW) spectra predicted in a given particle physics model. To scrutinize the importance of this effect, we perform large-scale parameter scans of the dynamical real-singlet extended Standard Model using three perturbative approximations for the effective potential: the $\overline{\rm MS}$ and on-shell schemes at leading order, and three-dimensional thermal effective theory (3D EFT) a…

This https://arxiv.org/abs/2308.00484 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Uniform attachment with freezing: Scaling limits
We investigate scaling limits of trees built by uniform attachment with freezing, which is a variant of the classical model of random recursive trees introduced in a companion paper. Here vertices are allowed to freeze, and arriving vertices cannot be attached to already frozen ones. We identify a phase transition when the number of non-frozen vertices roughly evolves as the total number of vertices to a given power. In particular, we observe a critical regime where the scaling limit is a rando…

This https://arxiv.org/abs/2310.08343 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Bootstrapping Deconfined Quantum Tricriticality
The paradigmatic example of deconfined quantum criticality is the Neel-VBS phase transition. The continuum description of this transition is the $N=2$ case of the $CP^{N-1}$ model, which is a field theory of $N$ complex scalars in 3d coupled to an Abelian gauge field with $SU(N)\times U(1)$ global symmetry. Lattice studies and duality arguments suggest the global symmetry of the $CP^1$ model is enhanced to $SO(5)$. We perform a conformal bootstrap study of $SO(5)$ invariant fixed points with on…

This https://arxiv.org/abs/2405.01949 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Bubble wall velocity and gravitational wave in the minimal left-right symmetric model
The bubble wall velocity in the first order phase transition plays an important role in determining both the amplitude and the pivot frequency of stochastic gravitational wave background. In the framework of the minimal left-right symmetric model, we study the wall velocity when the first order phase transition can occur. The wall velocity can be determined by matching the distribution functions in the free particle approximation and the local thermal equilibrium approximation. It is found that…

This https://arxiv.org/abs/2310.09079 has been replaced.
initial toot: https://mastoxiv.page/@…

Nature of the Volcano Transition in the Fully Disordered Kuramoto Model
Randomly coupled phase oscillators may synchronize into disordered patterns of collective motion. We analyze this transition in a large, fully connected Kuramoto model with symmetric but otherwise independent random interactions. Using the dynamical cavity method we reduce the dynamics to a stochastic single-oscillator problem with self-consistent correlation and response functions that we study analytically and numerically. We clarify the nature of the volcano transition and elucidate its rela…

This https://arxiv.org/abs/2401.17353 has been replaced.
link: https://scholar.google.com/scholar?q=a

Theory of a Strange Metal in a Quantum Superconductor to Metal Transition
Recent experiments with nanopatterned thin films revealed an unusual quantum superconductor to metal phase transition (QSMT) with a linear in temperature resistivity. In contrast, most known examples of such transitions and standard theoretical considerations predict a temperature-independent sheet resistance of order $R_Q = \frac{\hbar}{e^2}$. We propose an effective theory of a disordered superconductor which features a QSMT with robust $T$ linear resistivity at the critical point. The crucia…

The Griffiths phase and beyond: A large deviations study of the magnetic susceptibility of the two-dimensional bond-diluted Ising model
Lambert M\"unster, Alexander K. Hartmann, Martin Weigel
https://arxiv.org/abs/2405.02889

The Griffiths phase and beyond: A large deviations study of the magnetic susceptibility of the two-dimensional bond-diluted Ising model
The Griffiths phase in systems with quenched disorder occurs below the ordering transition of the pure system down to the ordering transition of the actual disordered system. While it does not exhibit long-range order, large fluctuations in the disorder degrees of freedom result in exponentially rare, long-range ordered states and hence the occurrence of broad distributions in response functions. Inside the Griffiths phase of the two-dimensional bond-diluted Ising model the distribution of the …

This https://arxiv.org/abs/2404.12939 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Superradiant phase transition in a large interacting driven atomic ensemble in free space
Atomic ensembles strongly interacting with light constitute rich quantum-optical many-body systems, with the potential for observing cooperative effects and dissipative nonequilibrium phase transitions. We theoretically analyze the conditions under which a driven atomic ensemble in free space, characterized by strong dipole-dipole interactions and large spatial extent, can undergo a superradiant phase transition, also known as cooperative resonance fluorescence. In an atomic array, stationary s…

Layered-to-Spinel Phase Transformation in Li$_{0.5}$NiO$_2$ from First Principles
Cem Komurcuoglu, Alan C. West, Alexander Urban
https://arxiv.org/abs/2403.02520

Layered-to-Spinel Phase Transformation in Li$_{0.5}$NiO$_2$ from First Principles
The phase transition layered Li$_{0.5}$NiO$_2$ to spinel Li(NiO$_2$)$_2$ is a potential degradation pathway in LiNiO$_2$-based lithium-ion battery cathodes. We investigated the mechanism of this phase transformation from first principles. Consistent with experimental observations reported in the literature, our results indicate a high energy barrier for the transformation due to high defect-formation energies, a complex charge-transfer mechanism, and electronic frustration. Our results suggest …

Primordial black holes and induced gravitational waves in non-singular matter bouncing cosmology
Theodoros Papanikolaou, Shreya Banerjee, Yi-Fu Cai, Salvatore Capozziello, Emmanuel N. Saridakis
https://arxiv.org/abs/2404.03779

Primordial black holes and induced gravitational waves in non-singular matter bouncing cosmology
We present a novel model-independent generic mechanism for primordial black hole formation within the context of non-singular matter bouncing cosmology. In particular, considering a short duration transition from the matter contracting phase to the Hot Big Bang expanding Universe, we find naturally enhanced curvature perturbations on very small scales which can collapse and form primordial black holes. Interestingly, the primordial black hole masses that we find can lie within the observational…

Exciton Condensation in Landau Levels of Quantum Spin Hall Insulators
Hong-Mao Peng, Zhan Wang, Long Zhang
https://arxiv.org/abs/2403.04691 https://…

Exciton Condensation in Landau Levels of Quantum Spin Hall Insulators
The interplay of band topology and electron interactions can lead to novel quantum states of matter. In this work, we theoretically study the quantum spin Hall insulator (QSHI) in a perpendicular magnetic field. In the noninteracting case, the QSHI with space inversion and uniaxial spin rotation symmetries undergoes a topological transition into a normal insulator phase at a critical magnetic field $B_{\mathrm{c}}$. The exciton condensation in the lowest Landau levels is triggered by Coulomb in…

Polymer Collapse and Liquid-Liquid Phase-Separation are Coupled in a Generalized Prewetting Transition
Mason N. Rouches, Benjamin B. Machta
https://arxiv.org/abs/2404.19158 https://arxiv.org/pdf/2404.19158
arXiv:2404.19158v1 Announce Type: new
Abstract: The three-dimensional organization of chromatin is thought to play an important role in controlling gene expression. Specificity in expression is achieved through the interaction of transcription factors and other nuclear proteins with particular sequences of DNA. At unphysiological concentrations many of these nuclear proteins can phase-separate in the absence of DNA, and it has been hypothesized that, in vivo, the thermodynamic forces driving these phases help determine chromosomal organization. However it is unclear how DNA, itself a long polymer subject to configurational transitions, interacts with three-dimensional protein phases. Here we show that a long compressible polymer can be coupled to interacting protein mixtures, leading to a generalized prewetting transition where polymer collapse is coincident with a locally stabilized liquid droplet. We use lattice Monte-Carlo simulations and a mean-field theory to show that these phases can be stable even in regimes where both polymer collapse and coexisting liquid phases are unstable in isolation, and that these new transitions can be either abrupt or continuous. For polymers with internal linear structure we further show that changes in the concentration of bulk components can lead to changes in three-dimensional polymer structure. In the nucleus there are many distinct proteins that interact with many different regions of chromatin, potentially giving rise to many different Prewet phases. The simple systems we consider here highlight chromatin's role as a lower-dimensional surface whose interactions with proteins are required for these novel phases.

Probing the topological phase transition in the Su-Schrieffer-Heeger model using Rydberg-atom synthetic dimensions
Yi Lu, Chuanyu Wang, Soumya K. Kanungo, F. Barry Dunning, Thomas C. Killian
https://arxiv.org/abs/2404.18420

Probing the topological phase transition in the Su-Schrieffer-Heeger model using Rydberg-atom synthetic dimensions
We simulate the the Su-Schrieffer-Heeger (SSH) model using Rydberg-atom synthetic dimensions constructed, in a single atom, from a ladder of six neighboring $n\:^3S_1$ Rydberg states in which adjacent states are coupled with two-photon transitions using microwave fields. Alternating strong/weak tunneling rates, controlled by adjusting the microwave amplitudes, are varied to map out the topological phase transition as a function of the ratio of the tunneling rates. For each ratio, quench dynam…

This https://arxiv.org/abs/2404.17624 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Phase transitions, critical behavior and microstructure of the FRW universe in the framework of higher order GUP
In this paper, we explore the the phase transition, critical behavior and microstructure of the FRW in the framework of a new higher order generalized uncertainty principle. Our initial step involves deriving the equation of state by defining the work density $W$ from GUP-corrected Friedmann equations as the thermodynamic pressure $P$. Based on the modified equation of state, we conduct an analysis of the $P-V$ phase transition in the FRW universe. Subsequently, we obtain the critical exponents…

This https://arxiv.org/abs/2402.06105 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Constraining the position of the CEP through the Speed of Sound in the LSMq
We study the chiral phase transition within the Linear Sigma Model with quarks from its thermodynamical potential considering quantum corrections up to ring diagrams in the high-temperature regime. Demanding a second order phase transition as expected in the chiral limit at low baryon chemical potential, that the curvature of the critical line matches the one obtained in lattice simulations and that the value of the speed of sound at high temperature and zero density has its measured value, we …

SU($\pmb N$) Kondo-Heisenberg chain: Phase diagram, Ising criticality, and the coexistence of heavy quasiparticles and valence bond solid order
Marcin Raczkowski, Fakher F. Assaad
https://arxiv.org/abs/2403.03694

SU($\pmb N$) Kondo-Heisenberg chain: Phase diagram, Ising criticality, and the coexistence of heavy quasiparticles and valence bond solid order
We map out the ground state phase diagram of a one-dimensional SU($N$) Kondo-Heisenberg lattice model at half filling and in the fully antisymmetric self-adjoint representation as a function of $\tfrac {1}{N}$ and Kondo coupling $J_k/t$. On the basis of auxiliary field quantum Monte Carlo (QMC) simulations with even $N$ up to 8, we show that the enlarged SU($N\ge 4$) symmetry realizes a quantum phase transition separating a valence bond solid (VBS) phase occupying a weak coupling part of the ph…

Theoretical studies on off-axis phase diagrams and Knight shifts in UTe$_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
Kazushige Machida
https://arxiv.org/abs/2405.01831

Theoretical studies on off-axis phase diagrams and Knight shifts in UTe$_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
Inspired by recent remarkable sets of experiments on UTe$_2$: discoveries of the fourth horizontal internal transition line running toward a tetra-critical point (TCP) at $H$=15T, the off-axis high field phases, and abnormally large Knight shift (KS) drop below $T_{\rm c}$ for $H$$\parallel$$a$-magnetic easy axis, we advance further our theoretical work on the field ($H$)-temperature ($T$) phase diagram for $H$$\parallel$$b$-magnetic hard axis which contains a positive sloped $H_{\rm c2}$ depar…

First-order rhombohedral to cubic phase transition in photoexcited GeTe
Matteo Furci, Giovanni Marini, Matteo Calandra
https://arxiv.org/abs/2404.19339 htt…

First-order rhombohedral to cubic phase transition in photoexcited GeTe
Photoexcited GeTe undergoes a non-thermal phase transition from a rhombohedral to a rocksalt crystalline phase. The microscopic mechanism and the nature of the transition are unclear. By using constrained density functional perturbation theory and by accounting for quantum anharmonicity within the stochastic self-consistent harmonic approximation, we show that the non-thermal phase transition is strongly first order and does not involve phonon softening, at odd with the thermal one. The transit…

Exploring nonequilibrium Andreev resonances in ultraclean graphene Andreev interferometers
Asmaul Smitha Rashid, Le Yi, Nitin Samarth, R\'egis M\'elin, Morteza Kayyalha
https://arxiv.org/abs/2405.02975

Exploring nonequilibrium Andreev resonances in ultraclean graphene Andreev interferometers
We study nonequilibrium Andreev resonances in a voltage-biased graphene three-terminal Josephson junction (JJ). We observe periodic oscillations of resistance with maxima at multiples of the magnetic flux quantum (noninversion regime). As we increase the bias voltage, we further observe a transition point beyond which oscillations exhibit a $π$ phase shift (inversion regime) with maxima of resistance occuring at multiples of half-flux quantum. At this transition point, the frequency of the osc…

This https://arxiv.org/abs/2307.08229 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Complexity, scaling, and a phase transition
We investigate the holographic complexity of CFTs compactified on a circle with a Wilson line, dual to magnetized solitons in AdS$_4$ and AdS$_5$. These theories have a confinement-deconfinement phase transition as a function of the Wilson line, and the complexity of formation acts as an order parameter for this transition. Through explicit calculation, we show that proposed complexity functionals based on volume and action obey a scaling relation with radius of the circle and further prove tha…

Bubble wall velocity and gravitational wave in the minimal left-right symmetric model
Dian-Wei Wang, Qi-Shu Yan, Mei Huang
https://arxiv.org/abs/2405.01949

Bubble wall velocity and gravitational wave in the minimal left-right symmetric model
The bubble wall velocity in the first order phase transition plays an important role in determining both the amplitude and the pivot frequency of stochastic gravitational wave background. In the framework of the minimal left-right symmetric model, we study the wall velocity when the first order phase transition can occur. The wall velocity can be determined by matching the distribution functions in the free particle approximation and the local thermal equilibrium approximation. It is found that…

This https://arxiv.org/abs/2310.20432 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Demonstration of a parity-time symmetry breaking phase transition using superconducting and trapped-ion qutrits
Scalable quantum computers hold the promise to solve hard computational problems, such as prime factorization, combinatorial optimization, simulation of many-body physics, and quantum chemistry. While being key to understanding many real-world phenomena, simulation of non-conservative quantum dynamics presents a challenge for unitary quantum computation. In this work, we focus on simulating non-unitary parity-time symmetric systems, which exhibit a distinctive symmetry-breaking phase transition…

Quantum phase transition between topologically distinct quantum critical points
Xue-Jia Yu, Wei-Lin Li
https://arxiv.org/abs/2403.03716 https://

Quantum phase transition between topologically distinct quantum critical points
By constructing an exactly solvable spin model, we investigate the critical behaviors of transverse field Ising chains interpolated with cluster interactions, which exhibit various types of topologically distinct Ising critical points. Using fidelity susceptibility as an indicator, we establish the global phase diagram, including ferromagnetic, trivial paramagnetic, and symmetry-protected topological phases. Different types of critical points exist between these phases, encompassing both topolo…

Theoretical studies on off-axis phase diagrams and Knight shifts in UTe$_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
Kazushige Machida
https://arxiv.org/abs/2405.01831

Theoretical studies on off-axis phase diagrams and Knight shifts in UTe$_2$ -- Tetra-critical point, d-vector rotation, and multiple phases
Inspired by recent remarkable sets of experiments on UTe$_2$: discoveries of the fourth horizontal internal transition line running toward a tetra-critical point (TCP) at $H$=15T, the off-axis high field phases, and abnormally large Knight shift (KS) drop below $T_{\rm c}$ for $H$$\parallel$$a$-magnetic easy axis, we advance further our theoretical work on the field ($H$)-temperature ($T$) phase diagram for $H$$\parallel$$b$-magnetic hard axis which contains a positive sloped $H_{\rm c2}$ depar…

Universal non-Hermitian flow in one-dimensional PT-symmetric quantum criticalities
Xin-Chi Zhou, Ke Wang
https://arxiv.org/abs/2405.01640 https://

Universal non-Hermitian flow in one-dimensional PT-symmetric quantum criticalities
The critical point of a topological phase transition is described by a conformal field theory (CFT), where the finite-size corrections to the ground state energy are uniquely related to its central charge. We study the finite-size scaling of the energy of non-Hermitian Su-Schrieffer-Heeger (SSH) model with parity and time-reversal symmetry ($\mathcal{PT}$) symmetry. We find that under open boundary condition (OBC), the energy scaling $E(L)\sim c/L$ reveals a negative central charge $c=-2$ at th…

This https://arxiv.org/abs/2310.19948 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Primordial Magnetogenesis in the Two-Higgs-doublet Model
$γ$-ray emission of blazars infer the presence of large-scale magnetic fields in the intergalactic medium, but their origin remains a mystery. Using recent data from MAGIC, H.E.S.S. and $\textit{Fermi}$-LAT, we investigate whether the large-scale magnetic fields in the intergalactic medium could have been generated by a first-order electroweak phase transition in the two-Higgs-doublet model (2HDM). We study two representative scenarios where we vary the initial conditions of the magnetic field…

This https://arxiv.org/abs/1909.12126 has been replaced.
link: https://scholar.google.com/scholar?q=a

Metal-insulator transition in CaCu$_3$Fe$_4$O$_{12}$
We study structurally-triggered metal-insulator transition in CaCu$_3$Fe$_4$O$_{12}$ by means of local density approximation (LDA) +$U$ and LDA+dynamical mean-field theory (DMFT). The ferrimagnetic insulating phase is essentially the same within both approaches. While LDA+$U$ describes the metal-insulator transition as a Peierls-like instability driven by Fermi surface nesting in the magnetically ordered phase, LDA+DMFT allows also the site-selective Mott transition without magnetic ordering as…

Decoupling the electronic gap from the spin Chern number in disordered higher-order topological insulators
Alexander C. Tyner, Cormac Grindall, J. H. Pixley
https://arxiv.org/abs/2403.03957

Decoupling the electronic gap from the spin Chern number in disordered higher-order topological insulators
In two-dimensional topological insulators, a disorder induced topological phase transition is typically identified with an Anderson localization transition at the Fermi energy. However, in higher-order, spin-resolved topological insulators it is the spectral gap of the spin-spectrum, in addition to the bulk mobility gap, which protects the non-trivial topology of the ground state. In this work, we show that these two gaps, the bulk electronic and spin gap, evolve distinctly upon introduction of…

This https://arxiv.org/abs/2304.14433 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Higher-form Symmetries under Weak Measurement
We aim to address the following question: if we start with a quantum state with a spontaneously broken higher-form symmetry, what is the fate of the system under weak local quantum measurements? We demonstrate that under certain conditions, a phase transition can be driven by weak measurements, which suppresses the spontaneous breaking of the 1-form symmetry and weakens the 1-form symmetry charge fluctuation. We analyze the nature of the transitions employing the tool of duality, and we demonst…

Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$
Oktay Aktas, Francisco Javier Romero, Zhengwang He, Gan Linyu, Xiangdong Ding, Jos\'e-Mar\'ia Mart\'in-Olalla, Maria-Carmen Gallardo, Turab Lookman
https://arxiv.org/abs/2404.19558

Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$
We study the phase transition behavior of the ferroelectric BaTi$_{0.8}$Zr$_{0.2}$O$_3$ in the paraelectric region. The temperature dependencies of thermal, polar, elastic and dielectric properties indicate the presence of local structures above the paraelectric-ferroelectric transition temperature Tc = 292 K. The non-zero remnant polarization is measured up to a characteristic temperature T* ~350 K, which coincides with the temperature where the dielectric constant deviates from Curie-Weiss la…

This https://arxiv.org/abs/2312.06749 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Electroweak Phase Transition with a Double Well Done Doubly Well
We revisit the electroweak phase transition in the scalar singlet extension of the standard model with a $\mathbb{Z}_2$ symmetry. In significant parts of the parameter space the phase transition occurs in two steps - including canonical benchmarks used in experimental projections for gravitational waves. Domain walls produced in the first step of the transition seed the final step to the electroweak vacuum, an effect which is typically neglected but leads to an exponentially enhanced tunnelling…

Pseudospin Polarization of Composite Fermions under Uniaxial Strain
Shuai Yuan, Jiaojie Yan, Ke Huang, Zhimou Chen, Haoran Fan, L. N. Pfeiffer, K. W. West, Yang Liu, Xi Lin
https://arxiv.org/abs/2403.03793

Pseudospin Polarization of Composite Fermions under Uniaxial Strain
A two dimensional system with extra degrees of freedom, such as spin and valley, is of great interest in the study of quantum phase transitions. The critical condition when a transition between different multicomponent fractional quantum Hall states appears is one of the very few junctions for many body problems between theoretical calculations and experiments. In this work, we present that uniaxial strain induces pseudospin transitions of composite fermions in a two-dimensional hole gas. Deter…

Emergent photons and fractionalized excitations in a quantum spin liquid
Bin Gao, F\'elix Desrochers, David W. Tam, Paul Steffens, Arno Hiess, Yixi Su, Sang-Wook Cheong, Yong Baek Kim, Pengcheng Dai
https://arxiv.org/abs/2404.04207

Emergent photons and fractionalized excitations in a quantum spin liquid
A quantum spin liquid (QSL) arises from a highly entangled superposition of many degenerate classical ground states in a frustrated magnet, and is characterized by emergent gauge fields and deconfined fractionalized excitations (spinons). Because such a novel phase of matter is relevant to high-transition-temperature superconductivity and quantum computation, the microscopic understanding of QSL states is a long-sought goal in condensed matter physics. The 3D pyrochlore lattice of corner-sharin…

This https://arxiv.org/abs/2302.10132 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Metrology and multipartite entanglement in measurement-induced phase transition
Measurement-induced phase transition arises from the competition between a deterministic quantum evolution and a repeated measurement process. We explore the measurement-induced phase transition through the Quantum Fisher Information in two different metrological scenarios. We demonstrate through the scaling behavior of the quantum Fisher information the transition of the multi-partite entanglement across the phases. In analogy with standard quantum phase transition, we reveal signature of a me…

Many-body Localization Transition of Ising Spin-1 Chains
Taotao Hu, Yining Zhang, Hang Ren, Yiwen Gao, Xiaodan Li, Jiameng Hong, Yuting Li
https://arxiv.org/abs/2405.02028

Many-body Localization Transition of Ising Spin-1 Chains
In this paper, we theoretically investigate the many-body localization properties of one-dimensional Ising spin-1 chains by using the methods of exact matrix diagonalization. We compare it with the MBL properties of the Ising spin-1/2 chains. The results indicate that the one-dimensional Ising spin-1 chains can also undergo MBL phase transition. There are various forms of disorder, and we compare the effects of different forms of quasi-disorder and random disorder on many-body localization in t…

Predicting Phase Transitions in PbTiO$_3$ using Zentropy
Nigel Lee En Hew, Shun-Li Shang, Zi-Kui Liu
https://arxiv.org/abs/2402.18425 https://

Predicting Phase Transitions in PbTiO$_3$ using Zentropy
According to conventional X-ray measurements, PbTiO$_3$ undergoes a phase transition from a tetragonal ferroelectric phase to a cubic paraelectric phase at 763 K. However, x-ray absorption fine-structure (XAFS) measurements indicate that PbTiO$_3$ is tetragonal even after the phase transition has occurred. The difference in these results concerns the length scales accessible to each measurement technique: millimeters for X-ray and Angstroms for XAFS. For both of these measurements to be consist…

Pseudospin Polarization of Composite Fermions under Uniaxial Strain
Shuai Yuan, Jiaojie Yan, Ke Huang, Zhimou Chen, Haoran Fan, L. N. Pfeiffer, K. W. West, Yang Liu, Xi Lin
https://arxiv.org/abs/2403.03793

Pseudospin Polarization of Composite Fermions under Uniaxial Strain
A two dimensional system with extra degrees of freedom, such as spin and valley, is of great interest in the study of quantum phase transitions. The critical condition when a transition between different multicomponent fractional quantum Hall states appears is one of the very few junctions for many body problems between theoretical calculations and experiments. In this work, we present that uniaxial strain induces pseudospin transitions of composite fermions in a two-dimensional hole gas. Deter…

A single-bubble source for gravitational waves in a cosmological phase transition
Kfir Blum, Mehrdad Mirbabayi
https://arxiv.org/abs/2403.20164 https://

A single-bubble source for gravitational waves in a cosmological phase transition
We show that quantum fluctuations of an expanding phase transition bubble give rise to gravitational wave (GW) emission, even when considering a single bubble, without bubble collisions or plasma effects. The ratio of GW energy to the total bubble energy reservoir increases with time as $\propto t$. If the bubble expands for long enough before percolation destroys it, back-reaction due to the GW emission becomes important after $t_{\rm br}\sim (16π^5) m_{\rm pl}^2R_0^3$, where $R_0$ is the bub…

This https://arxiv.org/abs/2312.00382 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

The effective potential of composite operator in the first order region of QCD phase transition
We propose a method to determine the effective potential of QCD from the gap equation, by introducing the homotopy method between the solutions of the equation of motion. Via this method, the effective potential beyond the bare vertex approximation is obtained, which then generalizes the Cornwall, Jackiw and Tomboulis (CJT) effective potential for the bilocal composite operators. Moreover, the extended effective potential is set to be a function of self energy instead of the propagator, which i…

This https://arxiv.org/abs/2403.00267 has been replaced.
link: https://scholar.google.com/scholar?q=a

Critical slowing of the spin and charge density wave order in thin film Cr following photoexcitation
We report on the evolution of the charge density wave (CDW) and spin density wave (SDW) order of a chromium film following photoexcitation with an ultrafast optical laser pulse. The CDW is measured by ultrafast time-resolved x-ray diffraction of the CDW satellite that tracks the suppression and recovery of the CDW following photoexcitation. We find that as the temperature of the film approaches a discontinuous phase transition in the CDW and SDW order, the time scales of recovery increase expon…

Fractonic criticality in Rydberg atom arrays
Rafael A. Macedo, Rodrigo G. Pereira
https://arxiv.org/abs/2405.02248 https://arxiv.org/…

Fractonic criticality in Rydberg atom arrays
Fractonic matter can undergo unconventional phase transitions driven by the condensation of particles that move along subdimensional manifolds. We propose that this type of quantum critical point can be realized in a bilayer of crossed Rydberg chains. This system exhibits a transition between a disordered phase and a charge-density-wave phase with subextensive ground state degeneracy. The transition is described by a stack of critical Ising conformal field theories that become decoupled in the …

This https://arxiv.org/abs/2311.00125 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Correlation between the symmetry energy slope and the deconfinement phase transition
We study how the nuclear symmetry energy slope ($L$) can affect the hadron-quark phase transition and neutron star properties. We show that the main physical quantities as the critical chemical potential and pressure are strongly influenced by the symmetry energy slope. In extreme cases, the total amount of deconfined quarks can reach up to 99$\%$ of the hybrid star mass.

This https://arxiv.org/abs/2404.18329 has been replaced.
initial toot: https://mastoxiv.page/@a…

Quantized Born Effective charges as probes for the topological phase transition in the Haldane and Kane-Mele models
We propose a new approach to study the transition between different topological states, based on the assessment of the vibrational resonances in infrared spectra. We consider the Haldane and Kane-Mele models finding that Born effective charges are nearly quantized, with a discontinuous jump concomitant with the topological phase transition. In particular, Born effective charges display a finite value in the trivial phase and a null one in the nontrivial one. This is rooted in the connection bet…

This https://arxiv.org/abs/2402.15389 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Quantum robustness of the toric code in a parallel field on the honeycomb and triangular lattice
We investigate the quantum robustness of the topological order in the toric code on the honeycomb lattice in the presence of a uniform parallel field. For a field in $z$-direction, the low-energy physics is in the flux-free sector and can be mapped to the transverse-field Ising model on the honeycomb lattice. One finds a second-order quantum phase transition in the 3D Ising$^\star$ universality class for both signs of the field. The same is true for a postive field in $x$-direction where an ana…

This https://arxiv.org/abs/2203.05889 has been replaced.
link: https://scholar.google.com/scholar?q=a

Addressing the Gravitational Wave - Collider Inverse Problem
We provide a roadmap for analyzing the interplay between hypothetical future collider observations and the detection of a gravitational wave signal produced by a strong first order electroweak phase transition in beyond the Standard Model (BSM) theories. A cornerstone of this roadmap is a combination of a dimensionally reduced, three-dimensional effective field theory and results of both perturbation theory and non-perturbative lattice simulations. For the first time we apply these state-of-the…

Gauged Q-ball dark matter through a cosmological first-order phase transition
Siyu Jiang, Fa Peng Huang, Pyungwon Ko
https://arxiv.org/abs/2404.16509 https…

Gauged Q-ball dark matter through a cosmological first-order phase transition
As a new type of dynamical dark matter mechanism, we discuss the stability of the gauged Q-ball dark matter and its production mechanism through a cosmological first-order phase transition. This work delves into the study of gauged Q-ball dark matter generated during the cosmic phase transition. We demonstrate detailed discussions on the stability of gauged Q-balls to rigorously constrain their charge and mass ranges. Additionally, employing analytic approximations and the mapping method, we pr…