Tootfinder

UK-based BBC Persian journalists say their families in Iran are being terrorised and punished by the Iranian regime, with a sharp escalation in 2025 (Tom Levitt/The Guardian)
https://www.theguardian.com/global-dev…

AJ Cole Trusts the New Raiders Regime https://www.si.com/nfl/raiders/aj-cole-pete-carroll-john-spytek-las-vegas

Time To Dust Off The Authoritarian Regime Survival Guide (The Big Picture)
https://thinkbigpicture.substack.com/p/trump-2025-authoritarian-regime-survival
http://www.memeorandum.com/250603/p5#a250603p5

This https://arxiv.org/abs/2402.05625 has been replaced.
link: https://scholar.google.com/scholar?q=a

Coded Many-User Multiple Access via Approximate Message Passing
We consider communication over the Gaussian multiple-access channel in the regime where the number of users grows linearly with the codelength. In this regime, schemes based on sparse superposition coding can achieve a near-optimal tradeoff between spectral efficiency and signal-to-noise ratio. However, these schemes are feasible only for small values of user payload. This paper investigates efficient schemes for larger user payloads, focusing on coded CDMA schemes where each user's information…

"Außenminister #Wadephul sagt #Israel weitere #Waffenlieferungen zu".
Wie unmoralisch ist das denn? Waffen, die das terroristische Regime Netanjahu gegen Frauen, Kinder, Kranke und Alte genau…

Krieg in Gaza: Hamas berichtet von weiteren Toten bei Verteilzentrum
Israels Armee soll mindestens drei Palästinenser getötet und Dutzende verletzt haben. Der US-Botschafter schlägt einen Palästinenserstaat in Frankreich vor. Das Liveblog

Quantum Acoustics with Tunable Nonlinearity in the Superstrong Coupling Regime
Marco Scigliuzzo, L\'eo Peyruchat, Riccardo Maria Marabini, Carla Becker, Vincent Jouanny, Per Delsing, Pasquale Scarlino
https://arxiv.org/abs/2505.24865

Quantum Acoustics with Tunable Nonlinearity in the Superstrong Coupling Regime
Precise control of mechanical modes in the quantum regime is a key resource for quantum technologies, offering promising pathways for quantum sensing with macroscopic systems and scalable architectures for quantum simulation. In this work, we realise a multimode mechanical cavity coupled to a superconducting Kerr resonator, which induces nonlinearity in the mechanical modes. The Kerr mode is realised by a flux-tunable SQUID array resonator, while the mechanical modes are implemented by a surfac…

Attacks by…? Come on, you’re so close… you can say it: israel. The murderous regime that’s carrying out a genocide. https://amicale.net/@france24_en/114608756066114347

Syrian intelligence files show that missing American journalist Austin Tice was imprisoned by the regime of the now-deposed Syrian President Bashar al-Assad (BBC)
https://www.bbc.com/news/articles/cn84z5e8jjzo

Austin Tice: Secret files show missing US journalist was imprisoned by Syria
The BBC has uncovered top secret files that confirm Austin Tice was imprisoned by Syria's Assad regime.

This https://arxiv.org/abs/2406.05820 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Thermodynamic phase description of charged 4D Gauss-Bonnet black holes in quantum regime
Glavan and Lin [Phys. Rev. Lett. 124, 081301 (2020)] ave argued for a 4D theory of Gauss-Bonnet (GB)gravity. This model predicts significant contributions of the GB coupling parameter $α$ to gravitational dynamics, while circumventing the Lovelock theorem and avoiding Ostrogradsky instability. As a powerful competitor to general relativity (GR), the model has been examined on various phenomenological grounds. Here, we employ a technique from information geometry to analyze the thermodynamic ph…

High-energy dynamics of QCD: Theoretical and phenomenological results
Gabriele Gatto
https://arxiv.org/abs/2506.03222 https://arxiv.o…

High-energy dynamics of QCD: Theoretical and phenomenological results
This work investigates the behavior of hadronic matter in the high-energy Regge-Gribov (semi-hard) regime of Quantum Chromodynamics (QCD), accessible through current and future colliders such as the LHC, EIC, and FCC. Central to the analysis is the Balitsky-Fadin-Kuraev-Lipatov (BFKL) formalism, with detailed treatment of the BFKL equation in both leading and next-to-leading logarithmic approximations. A major focus is placed on the computation of real next-to-leading order (NLO) corrections to…

This https://arxiv.org/abs/2505.13626 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Methods to Test the Source of the Extreme Gas Motions in WS 35
We present theoretical arguments toward the plausibility of a stellar wind}to explain the 16000\,km\,$s^{-1}$ line broadening in the optical spectra of WS 35, the central star in the Pa 30 nebula. The wind model is discussed in the context of super-Eddington flows. We argue that WS 35 potentially occupies a new regime of wind driving theory as the first metal-only wind. While this framework provides a promising avenue for explaining the high speed flow, questions remain about the source's true …

Turbulent drag on stellar mass black holes embedded in AGN discs
Alessandro Alberto Trani, Pierfrancesco Di Cintio
https://arxiv.org/abs/2506.02173 https:/…

Turbulent drag on stellar mass black holes embedded in AGN discs
We investigate how AGN disk turbulence affects the orbital dynamics of a stellar-mass black hole (BH) initially located at a migration trap, focusing on the long-term behavior of eccentricity and inclination in the quasi-embedded regime. We develop a semi-analytical framework in which turbulence is modeled as a stochastic velocity field acting through a modified drag force. We integrate the resulting stochastic differential equations both in Cartesian coordinates and in orbital elements using a…

This https://arxiv.org/abs/2505.09579 has been replaced.
initial toot: https://mastoxiv.page/@a…

Three regimes of a picosecond magnetoacoustics in ferromagnetic structures
The development of magnonics requires energy-efficient methods for generating spin waves and controlling their parameters. Acoustic waves are known to resonantly excite spin waves through magneto-elastic wave formation or to induce non-resonant forced magnetization oscillations. Short acoustic wavepackets enable another unexplored resonant interaction regime -- the Cherenkov radiation of spin waves. This raises a question regarding the criteria and signatures of these three regimes of picosecon…

On the rank of a random symmetric matrix in the large deviation regime
Yi Han
https://arxiv.org/abs/2506.01155 https://arxiv.org/pdf/…

On the rank of a random symmetric matrix in the large deviation regime
Let $A$ be an $n\times n$ random symmetric matrix with independent identically distributed subgaussian entries of unit variance. We prove the following large deviation inequality for the rank of $A$: for all $1\leq k\leq c\sqrt{n}$, $$\mathbb{P}(\operatorname{Rank}(A)\geq n-k)\geq 1-\exp(-c'kn),$$ for some fixed constants $c,c'>0$. A similar large deviation inequality is proven for the rank of the adjacency matrix of dense Erdos-Renyi graphs. This corank estimate enhances the recent breakthroug…

Trump’s determination to move fast could slow implementation of his tariff regime.
It also threatens to cost him credibility with businesses he’s counting on to invest in the U.S.
and world leaders whose buy-in he needs to negotiate trade deals.
Still, few expect a different posture from the famously intransigent fool or any second-guessing following the Wednesday ruling from the U.S. Court of International Trade, which briefly halted most of the tariffs

Transverse Distance Estimation with Higher-Order Hermite-Gauss modes
Dilip Paneru, Alessio D'Errico, Ebrahim Karimi
https://arxiv.org/abs/2506.02926 ht…

Transverse Distance Estimation with Higher-Order Hermite-Gauss modes
We explore the use of higher-order Hermite-Gauss modes for sensing optically induced transverse displacements. In the small-displacement regime, we show that projective measurements onto the two neighboring spatial modes yield optimal Fisher information, linearly scaling with the mode order $m$. We further extend the analysis to arbitrary displacement values and derive general expressions for the Fisher information, demonstrating that higher-order modes continue to outperform the fundamental Ga…

This https://arxiv.org/abs/2308.10270 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Stochastic Perturbations in the Fractional Nonlinear Schrödinger Equation: Well-posedness and Blow-up
This work investigates radial solutions for nonlinear fractional Schrödinger equations driven by multiplicative noise. Leveraging radial deterministic and stochastic Strichartz estimates, we establish local well-posedness in the energy-subcritical regime for the stochastic fractional nonlinear Schrödinger equation. Global existence is subsequently demonstrated through stochastic evolution of mass and energy. In focusing supercritical settings, we derive blow-up criteria via localized virial i…

Quantum-Ready Microwave Detection with Scalable Graphene Bolometers in the Strong Localization Regime
Yu-Cheng Chang (Pico group, QTF Centre of Excellence, Department of Applied Physics, Aalto University, Finland), Federico Chianese (Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden), Naveen Shetty (Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden), Johanna Huhtasaari (Department of M…

Quantum-Ready Microwave Detection with Scalable Graphene Bolometers in the Strong Localization Regime
Exploiting quantum interference of charge carriers, epitaxial graphene grown on silicon carbide emerges as a game-changing platform for ultra-sensitive bolometric sensing, featuring an intrinsic resistive thermometer response unmatched by any other graphene variant. By achieving low and uniform carrier densities, we have accessed a new regime of strong charge localization that dramatically reduces thermal conductance, significantly enhancing bolometer performance. Here we present scalable graph…

Only the Ambidextrous Can Flock: Two-dimensional Chiral Malthusian Flocks, Time crystals, and the KPZ Equation
Leiming Chen, Chiu Fan Lee, John Toner
https://arxiv.org/abs/2506.03488

Only the Ambidextrous Can Flock: Two-dimensional Chiral Malthusian Flocks, Time crystals, and the KPZ Equation
We study two-dimensional chiral dry Malthusian flocks; that is, chiral polar-ordered active matter with neither number nor momentum conservation. In the absence of fluctuations, these form a "time crystal", in which the velocity rotates uniformly at a fixed frequency. Fluctuations are described by the (2+1)-Kardar-Parisi-Zhang (KPZ) equation, which implies short-ranged orientational order. For weak chirality, the system is in the linear regime of the KPZ equation for a wide range of length scal…

This https://arxiv.org/abs/2506.01948 has been replaced.
initial toot: https://mastoxiv.page/@…

Multi-mode NOON states generation with ultracold atoms via geodesic counterdiabatic driving
We present a protocol for the generation of NOON states with ultracold atoms, leveraging the Bose-Hubbard model in the self-trapping regime. By the means of an optimized adiabatic protocol, we achieve a significant reduction in the time required for the preparation of highly entangled NOON states, involving two or more modes. Our method saturates the quantum speed limit, ensuring both efficiency and high fidelity in state preparation. A detailed analysis of the geodesic counterdiabatic driving …

Diagnosing the impact of relativistically intense prepulse on few-picosecond timeframes for short scale length laser-matter interactions
H. M. Huddleston, M. Yeung, C. R. J. Fitzpatrick, J. P. Kennedy, S. Palaniyppan, R. Shah, D. C. Gautier, M. Zepf, J. C. Fernandez, B. M. Hegelich, B. Dromey
https://arxiv.org/abs/2506.02798

Diagnosing the impact of relativistically intense prepulse on few-picosecond timeframes for short scale length laser-matter interactions
With the rapid proliferation of multi-petawatt (MPW) lasers globally, a new era of high-energy density science promises to emerge within the next decade. However, precise control over how light at these ultra-relativistic intensities interacts with matter (especially with solid-density targets) will be crucial to fully realize the cutting-edge scientific advancements and technological breakthroughs that the MPW regime promises to unlock. In this manuscript, we present experimental results, supp…

This https://arxiv.org/abs/2411.05791 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qfi…

Forecasting Company Fundamentals
Company fundamentals are key to assessing companies' financial and overall success and stability. Forecasting them is important in multiple fields, including investing and econometrics. While statistical and contemporary machine learning methods have been applied to many time series tasks, there is a lack of comparison of these approaches on this particularly challenging data regime. To this end, we try to bridge this gap and thoroughly evaluate the theoretical properties and practical performa…

This https://arxiv.org/abs/2501.19118 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Towards numerically exact computation of conductivity in the thermodynamic limit of interacting lattice models
Computing dynamical response functions in interacting lattice models is a long standing challenge in condensed matter physics. In view of recent results, the dc resistivity $ρ_\mathrm{dc}$ in the weak coupling regime of the Hubbard model is of great interest, yet it is not fully understood. The challenge lies in having to work with large lattices while avoiding analytical continuation. The weak-coupling $ρ_\mathrm{dc}$ results were so far computed at the level of the Boltzmann theory and at t…

Stephen Miller: 'the regime must use communist tactics — enforcing correct words and correct thinking and correct values — in order to fight, wait for it, “communist ideology.”'

Multishot Capacity of Networks with Restricted Adversaries
Giuseppe Cotardo, Gretchen L. Matthews, Alberto Ravagnani, Julia Shapiro
https://arxiv.org/abs/2506.03361

Multishot Capacity of Networks with Restricted Adversaries
We investigate adversarial network coding and decoding, focusing on the multishot regime and when the adversary is restricted to operate on a vulnerable region of the network. Errors can occur on a proper subset of the network edges and are modeled via an adversarial channel. The paper contains both bounds and capacity-achieving schemes for the Diamond Network, the Mirrored Diamond Network, and generalizations of these networks. We also initiate the study of the capacity of 3-level networks in …

This https://arxiv.org/abs/2502.17573 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Single pion resonant production in BSM scenarios: cross sections and amplitudes
We present a comprehensive theoretical framework describing single pion resonant production through inelastic dark fermion-nucleon interactions mediated by resonances in the GeV-scale regime. Building upon the Rein-Sehgal approach, we derive differential cross sections for processes in which an incoming dark fermion scatters off a nucleon, exciting a resonance that subsequently decays into a nucleon and a pion. Our formulation accommodates various mediator types-namely, dark photons with vector…

Experimental Exclusion of Planetary Mass Primordial Black Hole Mergers
William M. Campbell, Leonardo Mariani, Michael E. Tobar, Maxim Goryachev
https://arxiv.org/abs/2506.03609

Experimental Exclusion of Planetary Mass Primordial Black Hole Mergers
The multi-mode acoustic gravitational wave experiment (MAGE) is a high-frequency gravitational wave detection experiment featuring cryogenic quartz bulk acoustic wave resonators operating as sensitive strain antennas in the MHz regime. After 61 days of non-continuous data collection, we present bounds on the observable merger rate density of primordial black hole binary systems of chirp mass $1.2\times10^{-4}M_\odot<\mathcal{M}<1.7\times10^{-9}M_\odot$. The maximum achieved limit on the merger …

Turbulent puffs in transitional pulsatile pipe flow at moderate pulsation amplitudes
Daniel Mor\'on, Marc Avila
https://arxiv.org/abs/2506.01494 https:…

Turbulent puffs in transitional pulsatile pipe flow at moderate pulsation amplitudes
We show that, in the transitional regime of pulsatile pipe flow, at moderate-to-high amplitudes 0.5 < A < 1, the first long-lived turbulent structures are localized and take the form of the puffs and slugs observed in statistically steady pipe flow. We perform direct numerical simulations at many pulsation frequencies, amplitudes and Re, and observe different dynamics of puffs and slugs. At certain flow parameters we find, using a causal analysis, that puffs actively make use of linear instabil…

It's the holocaust. It entitles the Israeli government to impunity for the murder and expulsion of the inhabitants of the land where prosecuted Jews found refuge. Or so the Netanyahu regime seems to believe. Palestinians are semites, too, though, and evidently suffer antisemitism and its consequences just as much.
An interesting book to read:

The Invention of the Jewish People - Wikipedia

Relativistic Magnetic Reconnection in Astrophysical Plasmas: A Powerful Mechanism of Nonthermal Emission
Lorenzo Sironi, Dmitri A. Uzdensky, Dimitrios Giannios
https://arxiv.org/abs/2506.02101

Relativistic Magnetic Reconnection in Astrophysical Plasmas: A Powerful Mechanism of Nonthermal Emission
Magnetic reconnection -- a fundamental plasma physics process, where magnetic field lines of opposite polarity annihilate -- is invoked in astrophysical plasmas as a powerful mechanism of nonthermal particle acceleration, able to explain fast-evolving, bright high-energy flares. Near black holes and neutron stars, reconnection occurs in the ``relativistic'' regime, in which the mean magnetic energy per particle exceeds the rest mass energy. This review reports recent advances in our understandi…

Exercise can reduce the risk of cancer patients dying by a third,
stop tumours coming back
and is even more effective than drugs,
according to the results of a landmark trial that could transform health guidelines worldwide.

Did the Trump regime really just say that judges who try to stop the executive from abusing their authority are actually the ones abusing their authority?
I suppose the rubber/glue principle is probably the default in a regime run by a man with the mind of a 12 year old...

This https://arxiv.org/abs/2502.19236 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Universal Topology of Exceptional Points in Nonlinear Non-Hermitian Systems
Exceptional points (EPs) are non-Hermitian degeneracies where eigenvalues and eigenvectors coalesce, giving rise to unusual physical effects across scientific disciplines. The concept of EPs has recently been extended to nonlinear physical systems. We theoretically demonstrate a universal topology in the nonlinear parameter space for a large class of physical systems that support $2^\mathrm{nd}$ order EPs in the linear regime. Knowledge of this topology (called elliptic umbilic singularity in b…

This https://arxiv.org/abs/2503.17270 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

The Free-Energy Barrier of Precritical Nuclei in Hard Spheres is Consistent with Predictions
Predicting crystal nucleation is among the most significant long--standing challenges in condensed matter. In the system most studied (hard sphere colloids), the comparison between experiments performed using static light scattering and computer simulations is woeful, with a discrepancy of over 10 orders of magnitude. The situation with other well-studied materials (such as water and sodium chloride) is no better. It has thus far proven impossible to access the regime of this discrepancy with p…

Rudolf Rocker (1873–1958) was a prominent German anarchist writer and activist, best known for his advocacy of anarcho-syndicalism.
Rocker argued that genuine liberation cannot be achieved through authoritarian systems or centralized state power.
Rocker was deeply critical of the Bolshevik regime in Russia, viewing it as a betrayal of the ideals of freedom and workers’ self-management.
He believed that the Bolsheviks simply replaced one form of oppression with another, demo…

This https://arxiv.org/abs/2504.12252 has been replaced.
initial toot: https://mastoxiv.page/@a…

Electric field tunable spin-orbit gap in a bilayer graphene/WSe$_{2}$ quantum dot
We report on the investigation of proximity-induced spin-orbit coupling (SOC) in a heterostructure of bilayer graphene (BLG) and tungsten diselenide (WSe$_2$). A BLG quantum dot (QD) in the few-particle regime acts as a sensitive probe for induced SOC. Finite bias and magnetotransport spectroscopy measurements reveal a significantly enhanced SOC that decreases with the applied displacement field, distinguishing it from pristine BLG. Furthermore, our measurements demonstrate a reduced valley $g$…

Violation of Luttinger's theorem in one-dimensional interacting fermions
Meng Gao, Yin Zhong
https://arxiv.org/abs/2506.04064 https://

Violation of Luttinger's theorem in one-dimensional interacting fermions
Using the density matrix renormalization group method, we systematically investigate the evolution of the Luttinger integral in the one-dimensional generalized t-V model as a function of filling and interaction strength, identifying three representative phases. In the weak-coupling regime, the zero-frequency Green's function shows a branch-cut structure at the Fermi momentum, and the Luttinger integral accurately reflects the particle density. As the interaction increases, the spectral weight n…

Variational Inference for Latent Variable Models in High Dimensions
Chenyang Zhong, Sumit Mukherjee, Bodhisattva Sen
https://arxiv.org/abs/2506.01893 https…

Variational Inference for Latent Variable Models in High Dimensions
Variational inference (VI) is a popular method for approximating intractable posterior distributions in Bayesian inference and probabilistic machine learning. In this paper, we introduce a general framework for quantifying the statistical accuracy of mean-field variational inference (MFVI) for posterior approximation in Bayesian latent variable models with categorical local latent variables. Utilizing our general framework, we capture the exact asymptotic regime where MFVI `works' for the celeb…

Confinement-induced resonances for the creation of quasi-1D ultra cold gases of alkali--alkaline-earth dimers
Lorenzo Oghittu, Premjith Thekkeppatt, Nirav P. Mehta, Seth T. Rittenhouse, Klaasjan van Druten, Florian Schreck, Arghavan Safavi-Naini
https://arxiv.org/abs/2506.02579

Confinement-induced resonances for the creation of quasi-1D ultra cold gases of alkali--alkaline-earth dimers
We theoretically investigate the role of confinement-induced resonances (CIRs) in low-dimensional ultracold atomic mixtures for the formation of weakly bound dimers. To this end, we examine the scattering properties of a binary atomic mixture confined by a quasi-one-dimensional (quasi-1D) potential. In this regime, the interspecies two-body interaction is modeled as an effective 1D zero-range pseudopotential, with a coupling strength $g_\mathrm{1D}$ derived as a function of the three-dimensiona…

Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
Rui Zhou, Igor Vinograd, Hadrien Mayffre, Juan Porras, Hun-Ho Kim, Toshinao Loew, Yiran Liu, Matthieu Le Tacon, Bernhard Keimer, Marc-Henri Julien
https://arxiv.org/abs/2506.00617

Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
Charge-density wave (CDW) order is a key property of high-Tc cuprates, but its boundaries in the phase diagram and potential connections to other phases remain controversial. We report nuclear magnetic resonance (NMR) measurements in the prototypical cuprate YBa2Cu3Oy demonstrating that short-range static CDW order remains robust at optimal doping (p=0.165), exhibiting a strength and temperature dependence in the normal state similar to those observed at p=0.11 in the underdoped regime. For an …

This https://arxiv.org/abs/2501.16423 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities
Slow flavor evolution (defined as driven by neutrino masses and not necessarily ``slow'') is receiving fresh attention in the context of compact astrophysical environments. In Part~I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to plasma waves. The concept of resonance between flavor waves in the linear regime and propagating neutrinos is the defining feature of this approach. It is best motivated for weak instabilities, which probab…

Online Audio-Visual Autoregressive Speaker Extraction
Zexu Pan, Wupeng Wang, Shengkui Zhao, Chong Zhang, Kun Zhou, Yukun Ma, Bin Ma
https://arxiv.org/abs/2506.01270

Online Audio-Visual Autoregressive Speaker Extraction
This paper proposes a novel online audio-visual speaker extraction model. In the streaming regime, most studies optimize the audio network only, leaving the visual frontend less explored. We first propose a lightweight visual frontend based on depth-wise separable convolution. Then, we propose a lightweight autoregressive acoustic encoder to serve as the second cue, to actively explore the information in the separated speech signal from past steps. Scenario-wise, for the first time, we study ho…

This https://arxiv.org/abs/2212.00763 has been replaced.
link: https://scholar.google.com/scholar?q=a

A Strong-QCD Regime Measurement of the Proton's Spin Structure
The theory of the strong force, Quantum Chromodynamics (QCD) remains one of the most important ways to understand the fundamental properties of ordinary matter. However, at low momentum transfer Q2, in the regime where the strong force becomes extremely strong, our understanding of QCD for ordinary nucleons becomes hazy. Several cutting edge theories such as Chiral Perturbation Theory and Lattice QCD have provided valuable predictions in this regime, but Lattice QCD has not yet extended predict…

What right does Ireland have to inspect planes landing in Shannon?
What if I told you the EU requires an inspection regime to confirm a plane’s contents has been declared?
https://www.thegist.ie/the-gist-guns-shannon-and-vat/

Belgium is the third largest market for electric cars in Europe after Germany and France, which are much larger. The tax regime for company cars, which are a standard employee benefit alongside meal vouchers, has made this huge rise possible.
https://www.

The mantle-inner core gravitational mode of oscillation in a strong magnetic field regime
Mathieu Dumberry
https://arxiv.org/abs/2505.21271 https://…

The mantle-inner core gravitational mode of oscillation in a strong magnetic field regime
The mantle-inner core gravitational (MICG) mode is the free mode axial oscillation between the mantle and inner core sustained by the gravitational torque between their degree 2 order 2 density structures. Here, we investigate how the MICG mode is affected by oscillations of cylindrical surfaces in the fluid outer core in the form of Alfvén waves. The latter are triggered by oscillations of the tangent cylinder (TC) moving jointly with the inner core and propagate away from the rotation axis. …

This https://arxiv.org/abs/2410.14774 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Experimental targets for dark photon dark matter
Ultralight dark photon dark matter features distinctive cosmological and astrophysical signatures and is also supported by a burgeoning direct-detection program searching for its kinetic mixing with the ordinary photon over a wide mass range. Dark photons, however, cannot necessarily constitute the dark matter in all of this parameter space. In minimal models where the dark photon mass arises from a dark Higgs mechanism, early-Universe dynamics can easily breach the regime of validity of the lo…

Thermodynamic Signatures of Gaussian Entanglement Beyond Entropy
Beatriz Polo, Federico Centrone, Mir Alimuddin, Gerardo Adesso
https://arxiv.org/abs/2505.24596

Thermodynamic Signatures of Gaussian Entanglement Beyond Entropy
Continuous-variable quantum thermodynamics in the Gaussian regime provides a promising framework for investigating the energetic role of quantum correlations, particularly in optical systems. In this work, we introduce an entropy-free criterion for entanglement detection in bipartite Gaussian states, rooted in a distinct thermodynamic quantity: ergotropy -- the maximum extractable work via unitary operations. By defining the relative ergotropic gap, which quantifies the disparity between global…

This https://arxiv.org/abs/2505.19636 has been replaced.
initial toot: https://mastoxiv.page/@a…

Longitudinal magnetoconductivity in chiral multifold semimetals exemplified by pseudospin-1 nodal points
We embark on computing the longitudinal magnetoconductivity within the semiclassical Boltzmann formalism, where an isotropic triple-point semimetal (TSM) is subjected to collinear electric ($\boldsymbol E $) and magnetic ($\boldsymbol B$) fields. Except for the Drude part, the $B$-dependence arises exclusively from topological properties like the Berry curvature and the orbital magnetic moment. We solve the Boltzmann equations exactly in the linear-response regime, applicable in the limit of we…

Altermagnetic polarons
Maria Daghofer, Krzysztof Wohlfeld, Jeroen van den Brink
https://arxiv.org/abs/2506.03261 https://arxiv.org/pd…

Altermagnetic polarons
While a spin-dependent band splitting is one of the characteristic features of altermagnets, the conventional band picture itself breaks down in the many altermagnets that are correlated Mott materials. We employ two numerical many-body methods, the self-consistent Born approximation and variational cluster approach, to explore this strongly correlated regime and investigate hole motion in Mott altermagnets. Our results reveal that spin-dependent spectral-weight transfer is the dominant signatu…

Winners vs. Losers: Momentum-based Strategies with Intertemporal Choice for ESG Portfolios
Ayush Jha, Abootaleb Shirvani, Ali Jaffri, Svetlozar T. Rachev, Frank J. Fabozzi
https://arxiv.org/abs/2505.24250

Winners vs. Losers: Momentum-based Strategies with Intertemporal Choice for ESG Portfolios
This paper introduces a state-dependent momentum framework that integrates ESG regime switching with tail-risk-aware reward-risk metrics. Using a dynamic programming approach and solving a finite-horizon Bellman equation, we construct long-short momentum portfolios that adjust to changing ESG sentiment regimes. Unlike traditional momentum strategies based on historical returns, our approach incorporates the Stable Tail Adjusted Return ratio and Rachev ratio to better capture downside risk in tu…

This is who we are now.
https://myanmar-now.org/en/news/myanmar-nationals-deported-by-us-being-held-in-notorious-junta-detention-centre/

"When the Trump regime took over in January and Elon Musk's data-raiders started hacking federal agencies of various kinds, a group chat in which I participate started speculating about what kinds of terrible things this crowd might do. One member of the group wondered if the hacking might include the Social Security Administration's "death master file" – a list of people, presumably deceased, who would not receive any federal benefits and whose names and other identifying information would be flagged so that financial institutions would refuse to serve them.
What if, the conversation continued, the infamously cruel and paranoid regime decided to add living persons to the death master list? Doing so would destroy people's actual lives – which might make it just what a vicious government would do."
#USPolitics
https://cornerstone.dangillmor.com/essentials-april-12-2025/

Influence of photon inverse emission on forward-backward asymmetry in dilepton production at LHC
Vladimir Zykunov
https://arxiv.org/abs/2506.03736 https://…

Influence of photon inverse emission on forward-backward asymmetry in dilepton production at LHC
Contribution of photon inverse emission to the dilepton production process in hadron collisions for Large Hadron Collider (LHC) experimental program is calculated in details. Numerical analysis of inverse emission effects on observable quantities (cross sections and forward-backward asymmetry) is performed in a wide kinematical region including the CMS LHC experiment in Run3/HL regime which corresponds to ultra-high energies and dilepton invariant masses. Effective technics of additive relative…

Reaching extreme fields in laser-electron beam collisions with XUV laser light
Brandon K. Russell, Christopher P. Ridgers, Stepan S. Bulanov, Kyle G. Miller, Christopher Arran, Thomas G. Blackburn, Sergei V. Bulanov, Gabriele M. Grittani, John P. Palastro, Qian Qian, Alexander G. R. Thomas
https://arxiv.org/abs/2506.01727…

Reaching extreme fields in laser-electron beam collisions with XUV laser light
Plasma-based particle accelerators promise to extend the revolutionary work performed with conventional particle accelerators to studies with smaller footprints, lower costs, and higher energies. Here, we propose a new approach to access an unexplored regime of strong-field quantum electrodynamics by plasma wakefield acceleration of both charged particles and photons. Instead of using increasingly powerful accelerators and lasers, we show that photon acceleration of optical pulses into the extr…

Trumps Regime nicht "Faschismus" nennen ist Realitätsverweigerung - Volksverpetzer
https://www.volksverpetzer.de/analyse/trumps-faschismus-nennen/

Trumps Regime nicht "Faschismus" nennen ist Realitätsverweigerung
Unter Experten ist die Debatte, ob Trumps Bewegung "Faschismus" ist, inzwischen vorbei. Unsere Medien sollten die Dinge beim Namen nennen. Die Historikerin Annika Brockschmidt listet etliche Kennzeichen von Faschismus auf, und wie sie auf Trump zutreffen.

This https://arxiv.org/abs/2311.03795 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Periodicity of dynamical signatures of chaos in quantum kicked top
A host of dynamical measures of quantum correlations -- out-of-time ordered correlators (OTOC), Loschmidt echo, generalized entanglement and observational entropy -- are useful to infer the underlying classical chaotic dynamics in quantum regime. In this work, these measures are employed to analyse quantum kicked top with kick strength $k$. It is shown that, despite the differences in their definitions, these measures are periodic with $k$, and the periodicity depends on the number of spins rep…

Wall roughness and viscous dissipation effects in microchannel heat sinks with semicircular cross-section
A. Barletta, M. Celli, P. V. Brand\~ao
https://arxiv.org/abs/2505.24398

Wall roughness and viscous dissipation effects in microchannel heat sinks with semicircular cross-section
A statistical analysis of the wall roughness effect is carried out to determine the impact of the shape uncertainty on the Poiseuille number and Nusselt number of laminar forced convection. The focus is on the fully developed regime in a semicircular microchannel where the heat transfer occurs from the diametrical plane boundary, modelled as a perfectly smooth surface. On the other hand, the curved semicircular boundary is devised as rough and with a negligible wall heat flux. Three types of th…

Finally finished #Andor and I say it without a doubt: it is the most important (perhaps the best) Star Wars content since the original trilogy. I'm so happy that I got to see it but at the same time it's a shame that (probably) nothing like this would be made ever again.
Some more deep thoughts here:

A ★★★★★ review of Andor: A Disney+ Day Special Look (2022)
There is no other way to put this: Andor is the most important and most significant Star Wars content ever since the original trilogy. Perhaps even better. At it's core, the original Star Wars trilogy it's about the fight against an authoritarian regime. Certainly influenced by the impact of the Vietnam War and WWII. Although presented in a way that it's suitable for all audiences. Andor takes this premise and takes it to the extreme, to the brutality of war and rebellion, and to the hope and h…

Organizational Regularities in Recurrent Neural Networks
Claus Metzner, Achim Schilling, Andreas Maier, Patrick Krauss
https://arxiv.org/abs/2505.22047 htt…

Organizational Regularities in Recurrent Neural Networks
Previous work has shown that the dynamical regime of Recurrent Neural Networks (RNNs) - ranging from oscillatory to chaotic and fixpoint behavior - can be controlled by the global distribution of weights in connection matrices with statistically independent elements. However, it remains unclear how network dynamics respond to organizational regularities in the weight matrix, as often observed in biological neural networks. Here, we investigate three such regularities: (1) monopolar output weigh…

Gravity driven traveling bore wave solutions to the free boundary incompressible Navier-Stokes equations
Noah Stevenson, Ian Tice
https://arxiv.org/abs/2505.24562

Gravity driven traveling bore wave solutions to the free boundary incompressible Navier-Stokes equations
We give the first mathematical construction of two-dimensional traveling bore wave solutions to the free boundary incompressible Navier-Stokes equations for a single finite depth layer of constant density fluid. Our construction is based on a rigorous justification of the formal shallow water limit, which postulates that in a certain scaling regime the full free boundary traveling Navier-Stokes system of PDEs reduces to a governing system of ODEs. We find heteroclinic orbits solving these ODEs …

This https://arxiv.org/abs/2505.16768 has been replaced.
initial toot: https://mastoxiv.page/@arX…

High-Efficiency Plasma-Based Compressor for Ultrafast Soft X-ray Free-Electron Lasers
The generation of intense, femtosecond-scale X-ray pulses is crucial for probing matter under extreme temporal and field conditions. Current chirped-pulse amplification (CPA) techniques in free-electron lasers (FELs), however, face efficiency limitations in the soft X-ray regime due to the inherent constraints of conventional optical compressors. To address this challenge, we propose a high-efficiency plasma-based compressor utilizing highly ionized noble gas plasma. Exploiting strong refractiv…

"America Is Becoming the World’s Largest Tax Haven"
By Joseph E. Stiglitz
https://rooseveltinstitute.org/blog/largest-tax-haven/

Multi-mode NOON states generation with ultracold atoms via geodesic counterdiabatic driving
Dengis Simon, Sandro Wimberger, Peter Schlagheck
https://arxiv.org/abs/2506.01948

Multi-mode NOON states generation with ultracold atoms via geodesic counterdiabatic driving
We present a protocol for the generation of NOON states with ultracold atoms, leveraging the Bose-Hubbard model in the self-trapping regime. By the means of an optimized adiabatic protocol, we achieve a significant reduction in the time required for the preparation of highly entangled NOON states, involving two or more modes. Our method saturates the quantum speed limit, ensuring both efficiency and high fidelity in state preparation. A detailed analysis of the geodesic counterdiabatic driving …

This https://arxiv.org/abs/2501.16772 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qfi…

Trends and Reversion in Financial Markets on Time Scales from Minutes to Decades
We empirically analyze the reversion of financial market trends with time horizons ranging from minutes to decades. The analysis covers equities, interest rates, currencies and commodities and combines 14 years of futures tick data, 30 years of daily futures prices, 330 years of monthly asset prices, and yearly financial data since medieval times. Across asset classes, we find that markets are in a trending regime on time scales that range from a few hours to a few years, while they are in a …

This https://arxiv.org/abs/2503.16911 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepe…

Status and prospects of the $χ_{c1}(3872)$ at BESIII
The $χ_{c1}(3872)$ serves as a pivotal role for understanding hadronic structures, remaining one of the most extensively studied exotic particles despite the experimental discovery of numerous unconventional hadronic states. Sustained experimental and theoretical investigations into the particle over the past two decades have propelled its study into a high-precision regime, marked by refined measurements of its decay dynamics and line shape, thereby offering critical insights to resolve longs…

Observation of Resonant Tunneling from Molecular Shape into Vibronic Feshbach Resonances Followed by Mode-Specific Fragmentation
Narayan Kundu, Meenakshi Rana, Aryya Ghosh, Dhananjay Nandi
https://arxiv.org/abs/2505.00532

Observation of Resonant Tunneling from Molecular Shape into Vibronic Feshbach Resonances Followed by Mode-Specific Fragmentation
We present a kinematically complete study of dissociative electron attachment (DEA) in linear OCS molecules, focusing on how electrons resonantly attach and trigger dissociation. Near the Franck-Condon regime, DEA is dominated by molecular shape resonances, where transient OCS$^-$ states form with high vibrational amplitudes, spectroscopically evident as broad features in DEA cross-sections. As the electron beam energy increases from 5.5 to 6.0 eV, S$^-$ population shifts from lower to higher-e…

Conditional Method Confidence Set
Lukas Bauer, Ekaterina Kazak
https://arxiv.org/abs/2505.21278 https://arxiv.org/pdf/2505.21278

Conditional Method Confidence Set
This paper proposes a Conditional Method Confidence Set (CMCS) which allows to select the best subset of forecasting methods with equal predictive ability conditional on a specific economic regime. The test resembles the Model Confidence Set by Hansen et al. (2011) and is adapted for conditional forecast evaluation. We show the asymptotic validity of the proposed test and illustrate its properties in a simulation study. The proposed testing procedure is particularly suitable for stress-testing …

X-ray diffraction from smectic multilayers: crossover from kinematical to dynamical regime
V. V. Samsonov, K. V. Nikolaev, B. I. Ostrovskii, S. N. Yakunin
https://arxiv.org/abs/2505.23547

X-ray diffraction from smectic multilayers: crossover from kinematical to dynamical regime
We study X-ray diffraction in smectic liquid crystal multilayers. Such systems are fabricated as freely suspended films and have a unique layered structure. As such, they can be described as organic Bragg mirrors with sub-nanometer roughness. However, an interesting peculiarity arises in the diffraction on these structures: the characteristic shape of diffraction peaks associated with dynamical scattering effects is not observed. Instead, the diffraction can be well described kinematically, whi…

I guess there's no real need to explain why I'm doing this, but there's always someone who was lucky enough to be living in the jungle for a while (or something like that), disconnected from everything.
Hypothetical jungle person: I envy you.
Summary: I'm tired of big corporations stealing everything they can to train their #LLMs, and I'm also tired of companies like #Microsoft being active collaborators of the Trump regime.

This https://arxiv.org/abs/2505.21924 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Modified Transfer Matrix Method for the Extraction of Material Properties via Terahertz Time-Domain Spectroscopy
Terahertz Time-Domain Spectroscopy is a powerful technique for extracting the low-frequency optical properties of materials. However, the optical constants are difficult to determine directly from the experimental transfer function, such that various numerical approximations must be implemented to describe specific conditions. Here, we introduce a modified Transfer Matrix Method that uses a genetic algorithm for optimization to determine the refractive index of materials in the THz regime. We s…

Forcing regime change in America
https://www.theatlantic.com/ideas/archive/2025/02/doge-civil-servant-purge/681671/?gift=hVZeG3M9DnxL4CekrWGK38OD13Rx0lhyd5fWjR1YAEk

A New State of Matter between the Hadronic Phase and the Quark-Gluon Plasma?
Yuki Fujimoto, Kenji Fukushima, Yoshimasa Hidaka, Larry McLerran
https://arxiv.org/abs/2506.00237

A New State of Matter between the Hadronic Phase and the Quark-Gluon Plasma?
Lattice-QCD simulations and theoretical arguments hint at the existence of an intermediate phase of strongly interacting matter between a confined hadron gas and a deconfined Quark-Gluon Plasma (QGP). We qualitatively and semi-quantitatively explore and differentiate the phase structures in the temperature window from the QCD pseudo-critical temperature $T_c\simeq 160\;\text{MeV}$ to the pure-gluonic deconfinement temperature $T_d\simeq 285\;\text{MeV}$. We propose a three-regime picture using …

High resolution up-conversion imaging in the 10 {\mu}m band under incoherent illumination
Zhao-Qi-Zhi Han, Xiao-Hua Wang, Jin-Peng Li, Bo-Wen Liu, Zheng-He Zhou, He Zhang, Yin-Hai Li, Zhi-Yuan Zhou, Bao-Sen Shi
https://arxiv.org/abs/2505.24367

High resolution up-conversion imaging in the 10 μm band under incoherent illumination
Long-wavelength infrared band exhibits significant utility in thermal signature acquisition and molecular spectral analysis, among other applications. The up-conversion detection technique enables effective signal transduction into the detection bandwidth of silicon-based photodetectors, thereby facilitating high-sensitivity photonic measurements. We realized high-resolution up-conversion imaging for incoherent thermal targets in the 10 μm spectral regime for the first time. Furthermore, this …

This https://arxiv.org/abs/2505.05420 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nli…

Robustly optimal dynamics for active matter reservoir computing
Information processing abilities of active matter are studied in the reservoir computing (RC) paradigm to infer the future state of a chaotic signal. We uncover an exceptional regime of agent dynamics that has been overlooked previously. It appears robustly optimal for performance under many conditions, thus providing valuable insights into computation with physical systems more generally. The key to forming effective mechanisms for information processing appears in the system's intrinsic relax…

Spin-dependent transport through edge states in 2D semi-Dirac materials with Rashba spin-orbit coupling and band inversion
Marta Garc\'ia-Olmos, Yuriko Baba, Alexander L\'opez, Mario Amado, Rafael A. Molina
https://arxiv.org/abs/2505.24745

Spin-dependent transport through edge states in 2D semi-Dirac materials with Rashba spin-orbit coupling and band inversion
We investigate the bulk-boundary correspondence in two-dimensional type-I semi-Dirac materials with band inversion and Rashba spin-orbit coupling. Employing a dimensional reduction framework, we identify the Zak phase along the quadratically dispersing direction as a topological invariant that captures the presence of edge states. In the non-trivial topological regime, systems with finite width exhibit energy-dependent edge states that are topologically protected only at specific momenta. At kx…

Instantons and topological order in two-leg electron ladders: A universality class
S. -R. Eric Yang, Hyun Cheol Lee, Hoang-Anh Le, In-Hwan Lee
https://arxiv.org/abs/2505.24130

Instantons and topological order in two-leg electron ladders: A universality class
Our numerical study of the disordered Hubbard model with nearest-neighbor hopping shows that a two-leg electron ladder has a finite topological entanglement entropy in the regime where the density of states exhibits an exponentially decaying gap. The value of the topological entanglement entropy suggests that two-leg ladders belong to the same universality class as graphene zigzag nanoribbons, despite several structural differences. A Shankar-Witten-type bosonization Lagrangian with disorder ca…

This https://arxiv.org/abs/2502.02389 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIT_…

Rate-reliability tradeoff for deterministic identification
We investigate deterministic identification over arbitrary memoryless channels under the constraint that the error probabilities of first and second kind are exponentially small in the block length $n$, controlled by reliability exponents $E_1,E_2 \geq 0$. In contrast to the regime of slowly vanishing errors, where the identifiable message length scales linearithmically as $Θ(n\log n)$, here we find that for positive exponents linear scaling is restored, now with a rate that is a function of t…

Quantum Point Contact with Local Two-body Loss
Kensuke Kakimoto, Shun Uchino
https://arxiv.org/abs/2505.24391 https://arxiv.org/pdf/2…

Quantum Point Contact with Local Two-body Loss
Motivated by recent advances in ultracold atomic gas experiments, we investigate a two-terminal mesoscopic system in which two-body loss occurs locally at the center of a one-dimensional chain. By means of the self-consistent Born approximation in the Keldysh formalism, we uncover mesoscopic current formulas that are experimentally relevant and applicable to the weak dissipation regime. Although these formulas are analogous to those for systems with one-body loss, it turns out that the channel …

Optimizing fMRI Data Acquisition for Decoding Natural Speech with Limited Participants
Louis Jalouzot, Alexis Thual, Yair Lakretz, Christophe Pallier, Bertrand Thirion
https://arxiv.org/abs/2505.21304

Optimizing fMRI Data Acquisition for Decoding Natural Speech with Limited Participants
We investigate optimal strategies for decoding perceived natural speech from fMRI data acquired from a limited number of participants. Leveraging Lebel et al. (2023)'s dataset of 8 participants, we first demonstrate the effectiveness of training deep neural networks to predict LLM-derived text representations from fMRI activity. Then, in this data regime, we observe that multi-subject training does not improve decoding accuracy compared to single-subject approach. Furthermore, training on simil…

This https://arxiv.org/abs/2505.00427 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

A new approximate Eastin-Knill theorem
Transversal encoded gatesets are highly desirable for fault tolerant quantum computing. However, a quantum error correcting code which exactly corrects for local erasure noise and supports a universal set of transversal gates is ruled out by the Eastin-Knill theorem. Here we provide a new approximate Eastin-Knill theorem for the single-shot regime when we allow for some probability of error in the decoding. In particular, we show that a quantum error correcting code can support a universal set …

This https://arxiv.org/abs/2409.13412 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Tree-level unitarity constraints on heavy neutral leptons
Heavy neutral leptons (HNLs) can explain the origin of neutrino masses and oscillations over a wide range of masses. Direct experimental probes of HNLs become unfeasible for masses significantly above the electroweak scale.Consequently, the strongest limits arise from the non-observation of charged lepton flavor-violating processes induced by HNLs at loop level.Counter-intuitively, these bounds tighten as the HNL mass increases, an effect that persists within the perturbative regime. This wor…

I can't believe it, but the Trump regime is actually using its abusive legal practices to do the right thing, for once!
https://www.irishstar.com/news/us-news/breaking-trump-doj-launches-criminal-35260670

Trump DOJ launches criminal probe into Andrew Cuomo over 'COVID cover-up'
The Trump DOJ has launched a criminal probe into former New York governor and NYC mayoral front-runner Andrew Cuomo over allegations he lied to Congress about decisions made during the COVID-19 pandemic

This https://arxiv.org/abs/2411.05559 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Quantum processes as thermodynamic resources: the role of non-Markovianity
Quantum thermodynamics studies how quantum systems and operations may be exploited as sources of work to perform useful thermodynamic tasks. In real-world conditions, the evolution of open quantum systems typically displays memory effects, resulting in a non-Markovian dynamics. The associated information backflow has been observed to provide advantage in certain thermodynamic tasks. However, a general operational connection between non-Markovianity and thermodynamics in the quantum regime has r…

Nonlinear Stability and Dynamics of Supersonic Compressible Flows
Symphony Chakraborty (Institute of Astronomy,Astrophysics, Academia Sinica), Hsien Shang (Institute of Astronomy,Astrophysics, Academia Sinica)
https://arxiv.org/abs/2505.21650

Nonlinear Stability and Dynamics of Supersonic Compressible Flows
The study of shear layer instability in compressible flows is key to understanding phenomena from aerodynamics to astrophysical jets. Blumen's seminal paper [``Shear layer instability of an inviscid compressible fluid," J. Fluid Mech. {\bf 40}, 769--781 (1970)] established a linear stability framework for inviscid compressible shear flows, emphasizing velocity gradients and compressibility effects. However, the nonlinear regime remains insufficiently explored. This research extends Blumen's fra…

This https://arxiv.org/abs/2505.19034 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nli…

The influence of data gaps and outliers on resilience indicators
The resilience, or stability, of major Earth system components is increasingly threatened by anthropogenic pressures, demanding reliable early warning signals for abrupt and irreversible regime shifts. Widely used data-driven resilience indicators based on variance and autocorrelation detect `critical slowing down', a signature of decreasing stability. However, the interpretation of these indicators is hampered by poorly understood interdependencies and their susceptibility to common data issue…

This https://arxiv.org/abs/2505.16768 has been replaced.
initial toot: https://mastoxiv.page/@arX…

High-Efficiency Plasma-Based Compressor for Ultrafast Soft X-ray Free-Electron Lasers
The generation of intense, femtosecond-scale X-ray pulses is crucial for probing matter under extreme temporal and field conditions. Current chirped-pulse amplification (CPA) techniques in free-electron lasers (FELs), however, face efficiency limitations in the soft X-ray regime due to the inherent constraints of conventional optical compressors. To address this challenge, we propose a high-efficiency plasma-based compressor utilizing highly ionized noble gas plasma. Exploiting strong refractiv…

Record-high-Q AMTIR-1 microresonators for mid- to long-wave infrared nonlinear photonics
Liu Yang, Ryo Sugano, Ryomei Takabayashi, Hajime Kumazaki, Yongyong Zhuang, Xiaoyong Wei, Takasumi Tanabe, Shun Fujii
https://arxiv.org/abs/2505.23362

Record-high-Q AMTIR-1 microresonators for mid- to long-wave infrared nonlinear photonics
AMTIR-1 chalcogenide glass has shown its potential for use in thermal imaging systems owing to its low refractive index, thermal resistance and high transparency across the infrared wavelength regime. Here we report a millimeter-scale high-Q whispering gallery mode microresonator made of AMTIR-1. The recorded Q-factor has reached $1.2\times10^7$ at 1550~nm, which is almost two-orders of magnitude higher than previously reported values. We characterize the thermal properties, where low thermal c…

This https://arxiv.org/abs/2406.18974 has been replaced.
initial toot: https://mastoxiv.page/@a…

Non-Hermitian minimal Kitaev chains
Starting from a double quantum dot realization of a minimal Kitaev chain, we demonstrate that non-Hermicity stabilizes the so-called poor man's Majorana zero modes in a region of parameter space that is much broader than in the Hermitian regime. In particular, we consider the simplest non-Hermitian mechanism which naturally appears due to coupling to normal reservoirs and is commonly present in all transport experiments. Specifically, such couplings induce exceptional points which connect stabl…

This https://arxiv.org/abs/2501.08967 has been replaced.
initial toot: https://mastoxiv.page/@…

Eigenstate thermalization to non-monotonic distributions in strongly-interacting chaotic lattice gases
We find non-monotonic equilibrium energy distributions, qualitatively different from the Fermi-Dirac and Bose-Einstein forms, in strongly-interacting many-body chaotic systems. The effect emerges in systems with finite energy spectra, supporting both positive and negative temperatures, in the regime of quantum ergodicity. The results are supported by exact diagonalization calculations for chaotic Fermi-Hubbard and Bose-Hubbard models, when they have Wigner-Dyson statistics of energy spectra and…

Magnetostrictive Phononic Frequency Combs
Guanqi Ye, Ruitong Sun, Junning Zhao, Fusheng Ma
https://arxiv.org/abs/2505.23159 https://a…

Magnetostrictive Phononic Frequency Combs
Magnetostriction, mechanical-to-magnetic or magnetic-to-mechanical response, plays a pivotal role in magneto-mechanical systems. Here, we propose and experimentally demonstrate a magneto-mechanical frequency comb via the three-wave mixing mechanism, which solely requires the involvement of the fundamental mode f0 of a magnetostrictive macroresonator. Two types of combs, i.e., the integer-harmonic combs and the half-integer-harmonic combs, are observed in kHz regime with Hz resolution by magneti…

The influence of data gaps and outliers on resilience indicators
Teng Liu, Andreas Morr, Sebastian Bathiany, Lana L. Blaschke, Zhen Qian, Chan Diao, Taylor Smith, Niklas Boers
https://arxiv.org/abs/2505.19034

The influence of data gaps and outliers on resilience indicators
The resilience, or stability, of major Earth system components is increasingly threatened by anthropogenic pressures, demanding reliable early warning signals for abrupt and irreversible regime shifts. Widely used data-driven resilience indicators based on variance and autocorrelation detect `critical slowing down', a signature of decreasing stability. However, the interpretation of these indicators is hampered by poorly understood interdependencies and their susceptibility to common data issue…

Localization behavior in a Hermitian and non-Hermitian Raman lattice
Entong Zhao, Yu-Jun Liu, Ka Kwan Pak, Peng Ren, Mengbo Guo, Chengdong He, Gyu-Boong Jo
https://arxiv.org/abs/2505.22319

Localization behavior in a Hermitian and non-Hermitian Raman lattice
We introduce a flexible Raman lattice system for alakaline-earth like atoms to investigate localization behaviors in a quasi-periodic lattice with controllable non-Hermiticity. We demonstrate that critical phases and mobility edges can arise by adjusting spin-dependence of the incommensurate potentials in the Hermitian regime. With non-Hermiticity introduced by spin-selective atom loss, we find the localization behaviour in this system can be suppressed by dissipation. Our work provides insight…

High-Efficiency Plasma-Based Compressor for Ultrafast Soft X-ray Free-Electron Lasers
Mingchang Wang, Li Zeng, Bingbing Zhang, Qinghao Zhu, Xiaozhe Shen, Xiaofan Wang, Qinming Li, Weiqing Zhang
https://arxiv.org/abs/2505.16768

High-Efficiency Plasma-Based Compressor for Ultrafast Soft X-ray Free-Electron Lasers
The generation of intense, femtosecond-scale X-ray pulses is crucial for probing matter under extreme temporal and field conditions. Current chirped-pulse amplification (CPA) techniques in free-electron lasers (FELs), however, face efficiency limitations in the soft X-ray regime due to the inherent constraints of conventional optical compressors. To address this challenge, we propose a high-efficiency plasma-based compressor utilizing highly ionized noble gas plasma. Exploiting strong refractiv…