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Stabilization of long-range order in low-dimensional nonequilibrium $O(N)$ models
Oriana K. Diessel, Jaewon Kim, Ehud Altman
https://arxiv.org/abs/2507.01959

Stabilization of long-range order in low-dimensional nonequilibrium $O(N)$ models
It is now well established that the Mermin-Wagner theorem can be circumvented in nonequilibrium systems, allowing for the spontaneous breaking of a continuous symmetry and the emergence of long-range order in low dimensions. However, only a few models demonstrating this violation are known, and they often rely on specific mechanisms that may not be generally applicable. In this work, we identify a new mechanism for nonequilibrium-induced long-range order in a class of $O(N)$-symmetric models. I…

Hybrid antiferroelectric-ferroelectric domain walls in noncollinear antipolar oxides
Ivan N. Ushakov, Mats Topstad, Muhammad Z. Khalid, Niyorjyoti Sharma, Christoph Grams, Ursula Ludacka, Jiali He, Kasper A. Hunnestad, Mohsen Sadeqi-Moqadam, Julia Glaum, Sverre M. Selbach, Joachim Hemberger, Petra Becker, Ladislav Bohat\'y, Amit Kumar, Jorge \'I\~niguez-Gonz\'alez, Antonius T. J. van Helvoort, Dennis Meier

Hybrid antiferroelectric-ferroelectric domain walls in noncollinear antipolar oxides
Antiferroelectrics are emerging as advanced functional materials and are fertile ground for unusual electric effects. For example, they enhance the recoverable energy density in energy storage applications and give rise to large electromechanical responses. Here, we demonstrate noncollinearity in dipolar order as an additional degree of freedom, unlocking physical properties that are symmetry-forbidden in classical antiferroelectrics. We show that noncollinear order of electric dipole moments i…

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Nonclassical phonon pair
Yu Wang, Zhen Shen, Mai Zhang, Zhi-Peng Shi, Hong-Yi Kuang, Shuai Wan, Fang-Wen Sun, Guang-Can Guo, Chun-Hua Dong
https://arxiv.org/abs/2509.24429 https…

Nonclassical phonon pair
Quantum-correlated photon pairs are crucial resources for modern quantum information science. Similarly, the reliable generation of nonclassical phonon pairs is vital for advancing engineerable solid-state quantum devices and hybrid quantum networks based on phonons. Here, we present a novel approach to generate quantum-correlated phonon pairs in a suspended silicon microstructure initialized in its motional ground state. By simultaneously implementing red- and blue-detuned laser pulses, equiva…

Stochastic Two-temperature Nonequilibrium Ising model
Debraj Dutta, Ritwick Sarkar, Urna Basu
https://arxiv.org/abs/2509.00494 https://arxiv.org/pdf/2509.0…

Stochastic Two-temperature Nonequilibrium Ising model
We investigate the nonequilibrium stationary state (NESS) of the two-dimensional Ising model under a stochastic dichotomous modulation of temperature, which alternates between $T_c \pm δ$ around the critical temperature $T_c$ at a rate $γ$. Both magnetization and energy exhibit non-monotonic dependence on $γ$, explained by a renewal approach in the slow-switching limit, while for small $δ$ dynamical response theory quantitatively captures the $γ$-dependence of the observables. In the fast-…

[2025-10-02 Thu (UTC), 13 new articles found for astro-ph.CO Cosmology and Nongalactic Astrophysics]
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Metallurgy at the nanoscale: domain walls in nanoalloys
Gr\'egoire Breyton (MPQ), Hakim Amara (MPQ), Jaysen Nelayah (MPQ), Christine Mottet (CINaM), Riccardo Gatti (ICMMO), J\'er\^ome Creuze (ICMMO), Adrien Moncomble (MPQ), Damien Alloyeau (MPQ), Nathaly Ortiz Pe\~na (MPQ), Guillaume Wang (MPQ), Christian Ricolleau (MPQ)
https://ar…

Metallurgy at the nanoscale: domain walls in nanoalloys
In binary alloys, domain walls play a central role not only on the phase transitions but also on their physical properties and were at the heart of the 70's metallurgy research. Whereas it can be predicted, with simple physics arguments, that such domain walls cannot exist at the nanometer scale due to the typical lengths of the statistical fluctuations of the order parameter, here we show, with both experimental and numerical approaches how orientational domain walls are formed in CuAu nanopar…

Many-Body Fluctuation Theorems for Quantum Coherence and Correlation Dynamics
Kun Zhang, Mo-Yang Ni, Hai-Long Shi, Xiao-Hui Wang, Jin Wang
https://arxiv.org/abs/2507.01602

Many-Body Fluctuation Theorems for Quantum Coherence and Correlation Dynamics
Fluctuation theorems establish exact relations for nonequilibrium dynamics, profoundly advancing the field of stochastic thermodynamics. In this Letter, we extend quantum fluctuation theorems beyond the traditional thermodynamic framework to quantum information dynamics and many-body systems, where both the system and the environment are multipartite without assuming any thermodynamic constraints. Based on the two-point measurement scheme and the classical probability, we establish the fluctuat…

Transporting Baguettes With Minimal Action: The Geometry of Optimal Nonequilibrium Processes in Stochastic Thermodynamics
Adrianne Zhong
https://arxiv.org/abs/2509.22886 https:/…

Transporting Baguettes With Minimal Action: The Geometry of Optimal Nonequilibrium Processes in Stochastic Thermodynamics
What are the fundamental limitations placed by the laws of thermodynamics on the energy expenditure needed to carry out a given task in a nonequilibrium environment in finite time? In this thesis, we investigate "optimal nonequilibrium processes": how nonequilibrium state changes in a thermodynamic system may be performed most efficiently, in the sense of requiring the least amount of thermodynamic work. Surprisingly, there is a hidden, fundamental geometric structure in this optimization probl…

Low Temperature Formation of Crystalline VO2 Domains in Porous 1 Nanocolumnar Thin Films for Thermochromic Applications
H. Acosta-Rivera, V. Rico, F. J. Ferrer, T. C. Rojas, R. Alvarez, N. Martin, A. R. Gonzalez-Elipe, A. Palmero
https://arxiv.org/abs/2507.23393

Low Temperature Formation of Crystalline VO2 Domains in Porous 1 Nanocolumnar Thin Films for Thermochromic Applications
The formation of VO2 crystalline domains in amorphous substoichiometric nanocolumnar VOx thin films subjected to an oxidation process at temperatures below 300°C has been studied. It is obtained that values of [O]/[V] above 1.9 lead to the sole formation of V2O5 after oxidation, while values below 1.9 favor the formation of VO2, V3O7 and V2O5 crystalline domains for temperatures as low as 260°C. Moreover, it is found that the adsorption of oxygen and its incorporation into the film network pr…