Tootfinder

This https://arxiv.org/abs/2502.14447 has been replaced.
initial toot: https://mastoxiv.page/@a…

Thermal conductance at the superradiant phase transition in the quantum Rabi model
The quantum Rabi model exhibits a superradiant phase transition when the coupling becomes strong, even though it involves only two components: a two-level atom and a single bosonic mode. This phase transition is referred to as a finite-component quantum phase transition, in contrast to conventional phase transitions in many-body systems. In this Letter, we investigate heat transport across an atom embedded in bosonic modes, modeled by the quantum Rabi model, between two thermal baths. We found …

Traveling waves for a two-phase Stefan problem with radiation
Elena Dematt\`e, Juan J. L. Vel\'azquez
https://arxiv.org/abs/2506.01821 https://

Traveling waves for a two-phase Stefan problem with radiation
In this paper we study the existence of traveling wave solutions for a free-boundary problem modeling the phase transition of a material where the heat is transported by both conduction and radiation. Specifically, we consider a one-dimensional two-phase Stefan problem with an additional non-local non-linear integral term describing the situation in which the heat is transferred in the solid phase also by radiation, while the liquid phase is completely transparent, not interacting with radiatio…

Density of spectral gap property for positively expansive dynamics and smooth potentials, with applications to the phase transition problem
Thiago Bomfim, Victor Carneiro
https://arxiv.org/abs/2505.23934

Density of spectral gap property for positively expansive dynamics and smooth potentials, with applications to the phase transition problem
It is known that all uniformly expanding dynamics $f: M \rightarrow M$ have no phase transition with respect to a Hölder continuous potential $ϕ: M \rightarrow \mathbb{R}$, in other words, the topological pressure function $\mathbb{R} \ni t \mapsto P_{top}(f , tϕ)$ is analytical. Moreover, the associated transfer operator $\mathcal{L}_{f , tϕ}$, acting on the space of Hölder continuous functions, has the spectral gap property for $t \in \mathbb{R}$. For dynamics that are topologically conj…

Nematicity in iron pnictides: phase competition and emergent symmetry
Yiming Wang, Changle Liu, Shan Wu, Jianda Wu, Qimiao Si, Rong Yu
https://arxiv.org/abs/2505.24847

Nematicity in iron pnictides: phase competition and emergent symmetry
The phase diagram of iron-based superconductors contains a host of electronic orders, which are intimately connected with their superconductivity. Here we analyze the fluctuations of one type of nematic order in another. Our analysis leads to an emergent U(1) symmetry at a first-order transition between a nematic phase and a $C_4$-symmetric charge-ordered phase. We characterize the continuous symmetry in terms of a certain hidden Lie algebra that links the different orders. This emergent symmet…

An Effective Sphaleron Awakens
Xu-Xiang Li, Michael J. Ramsey-Musolf, Tuomas V. I. Tenkanen, Yanda Wu
https://arxiv.org/abs/2506.01585 https://

An Effective Sphaleron Awakens
Using thermal effective field theory, we present a self-consistent perturbative formulation of the Higgs phase sphaleron rate after a radiatively-induced first-order phase transition. This gauge-invariant formulation is based on dimensionally reduced effective field theory (3D EFT) at high temperatures and paves a way for including higher order corrections within the 3D EFT perturbation theory without double counting. Concretely, we compute the Higgs phase sphaleron rate in a semi-classical app…

This https://arxiv.org/abs/2411.06332 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Quantum feedback induced entanglement relaxation and dynamical phase transition in monitored free fermion chains with Wannier-Stark ladder
In recent years, measurement induced entanglement transitions (MIETs) have attracted significant attention. However, the dynamical transition associated with the feedback induced skin effect, which exhibits a wealth of intriguing phenomena, has not been fully understood. In this work, we investigate a dynamical phase transition in a tilted free-fermion chain under measurement-feedback protocols, emphasizing the particle density and entanglement entropy dynamics. We reveal a feedback induced ski…

Roughening and dynamics of an electric flux string in a (2 1)D lattice gauge theory
Francesco Di Marcantonio, Sunny Pradhan, Sofia Vallecorsa, Mari Carmen Ba\~nuls, Enrique Rico Ortega
https://arxiv.org/abs/2505.23853

Roughening and dynamics of an electric flux string in a (2+1)D lattice gauge theory
We investigate the roughening transition in the pure $\mathbb{Z}_2$ lattice gauge theory in (2+1) dimensions. Using numerical simulations with matrix product states, we explore the static and dynamical properties of an electric flux string between two static charges as the coupling is varied and approaches the deconfinement phase transition from the confined phase. Within the roughening region, we obtain the universal Lüscher correction to the confining potential and observe the expected resto…

Markovian dissipation can stabilize a (localization) quantum phase transition
Naushad A. Kamar, Mostafa Ali, Mohammad Maghrebi
https://arxiv.org/abs/2505.22721

Markovian dissipation can stabilize a (localization) quantum phase transition
Quantum phase transitions are a cornerstone of many-body physics at low temperatures but have remained elusive far from equilibrium. Driven open quantum systems -- a prominent non-equilibrium platform where coherent dynamics competes with Markovian dissipation from the environment -- often exhibit an effective classical behavior. In this work, we present a nontrivial quantum phase transition that is stabilized, rather than destroyed, by Markovian dissipation. We consider a variant of the paradi…

Constraints on the strength of first-order phase transition in the low density region
Bikai Gao
https://arxiv.org/abs/2505.21970 https://

Constraints on the strength of first-order phase transition in the low density region
We systematically studied the first-order phase transitions in the low-density region of neutron star matter using a unified framework combining the parity doublet model for hadronic matter, an NJL-type quark model for high-density quark matter, and a model-independent intermediate region treatment. By confronting with recent neutron star observation constraints, we find it possible to have the early phase transitions (PT) at low densities ($n_B \leq 2n_0$) in a way consistent with existing neu…

This https://arxiv.org/abs/2409.02236 has been replaced.
initial toot: https://mastoxiv.page/@a…

Umklapp-driven first-order transition into a charge-density wave phase
Using phenomenological Landau free energy, we systematically analyze influence of so-called umklapp contributions on the phase diagram of a solid hosting a commensurate charge-density wave phase. The umklapp terms may change the transition into the ordered state from continuous (second-order) to discontinuous (first-order). Additional elements, such as critical and tricritical points, emerge on the phase diagram under suitable conditions. The proposed mechanism is generalized for the case of ne…

This https://arxiv.org/abs/2505.07655 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Flowing from the Ising Model on the Fuzzy Sphere to the 3D Lee-Yang CFT
We employ the Fuzzy Sphere regulator to study the 3D Lee-Yang CFT. The model is defined by deforming the Ising model on the Fuzzy Sphere via a purely imaginary longitudinal magnetic field. This model undergoes a quantum phase transition, whose critical point we determine and identify with the 3D Lee-Yang CFT. We show how to tune the model and find that the lowest-lying states of the Hamiltonian align well with the expected CFT spectrum. We discuss the Fuzzy Sphere estimates for the scaling dime…

Tuning the Chern number of Kitaev quantum spin liquid
Seong Jun Kwon, Kyusung Hwang, Suk Bum Chung
https://arxiv.org/abs/2505.23282 https://

Tuning the Chern number of Kitaev quantum spin liquid
It is now well understood that non-Kitaev spin interactions can be added to the Kitaev quantum spin liquid by applying external fields. Recent years have seen intensive discussion on the possible phase transitions that these spin interactions induce. In this paper, we will show through the perturbation theory the possibility of accessing a gapped spin liquid phase with a higher Chern number through, in contrast to the cases studied in literature, a continuous phase transition. Such a transition…

Dimensionality-Driven Anomalous Metallic State with Zero-field Nonreciprocal Transport in Layered Ising Superconductors
Yanwei Cui, Zenglin Liu, Qin Liu, Junlin Xiong, Yongqin Xie, Yudi Dai, Ji Zhou, Lizheng Wang, Hanyan Fang, Haiwen Liu, Shi-Jun Liang, Bin Cheng, Feng Miao
https://arxiv.org/abs/2505.22274

Dimensionality-Driven Anomalous Metallic State with Zero-field Nonreciprocal Transport in Layered Ising Superconductors
The anomalous metal state (AMS), observed in failed superconductors, provides insights into superconductivity and quantum criticality, with studies revealing unconventional quantum phases like the Bose metal. Recently, layered transition metal dichalcogenide (TMD) superconductors approaching the two-dimensional limit have garnered significant attention for the enhanced phase fluctuations and electronic correlations. Investigating AMS in these systems, particularly in the absence of an external …

Symmetry breaking in time-dependent billiards
Anne K\'etri Pasquinelli da Fonseca, Edson Denis Leonel
https://arxiv.org/abs/2505.20488 https://

Symmetry breaking in time-dependent billiards
We investigate symmetry breaking in a time-dependent billiard that undergoes a continuous phase transition when dissipation is introduced. The system presents unlimited velocity, and thus energy growth for the conservative dynamics. When inelastic collisions are introduced between the particle and the boundary, the velocity reaches a plateau after the crossover iteration. The system presents the expected behavior for this type of transition, including scale invariance, critical exponents relate…

Merton model and Poisson process with Log Normal intensity function
Masato Hisakado, Shintaro Mori
https://arxiv.org/abs/2505.13822 https://

Merton model and Poisson process with Log Normal intensity function
This study considers the Merton model with temporal correlation. We show the Merton model becomes Poisson process with the log-normal distributed intensity function in the limit. We discuss the relation between this model and Hawkes process. In this model we confirm the super-normal transition when the temporal correlation is power case. The phase transition is same as seen before the limit. We apply this model to the default portfolios and find that the power decay model provides better genera…