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We revisit the one-dimensional ferromagnetic Ising spin-chain with a finite number of spins and periodic boundaries and derive analytically and verify numerically its various stationary and dynamical properties at different temperatures. In…

The emergence of complex modulated structures in the magnetization pattern of thin films is a well-established experimental phenomenology caused by the frustrating effects of competing interactions. Using a coarse-grained version of the…

We describe a phase transition that gives rise to structurally non-trivial states in a two-dimensional ordered network of particles connected by harmonic bonds. Monte Carlo simulations reveal that the network supports, apart from the…

软凝聚态物质 · 物理学 2017-04-05 Saswati Ganguly , Jürgen Horbach , Peter Sollich , Parswa Nath , Smarajit Karmakar , Surajit Sengupta

Motivated by recent experiments on cuprates with low-dimensional magnetic interactions, a new class of two-dimensional Ising models with short-range interactions and mobile defects is introduced and studied. The non-magnetic defects form…

凝聚态物理 · 物理学 2009-11-07 W. Selke , V. L. Pokrovsky , B. Buechner , T. Kroll

We study the nearest-neighbor spin-ice model subjected to a magnetic field applied along the global [111] and [110] directions, focusing on the role of sample geometry in stabilizing topological phase transitions. While no Kasteleyn…

统计力学 · 物理学 2026-04-30 R. A. Borzi , E. S. Loscar , S. A. Grigera

The time evolution of a spin-1/2 particle under the influence of a locally applied external magnetic field, and interacting with anisotropic spin environment in thermal equilibrium at temperature $T$ is studied. The exact analytical form of…

量子物理 · 物理学 2011-10-19 Y. Hamdouni , F. Petruccione

We study the steady state of a three-level system in contact with a non-equilibrium environment, which is composed of two independent heat baths at different temperatures. We derive a master equation to describe the non-equilibrium process…

量子物理 · 物理学 2015-06-05 Sheng-Wen Li , C. Y. Cai , C. P. Sun

We show that the nonequilibrium dynamics of systems with many interacting elements located on a small-world network can be much slower than on regular networks. As an example, we study the phase ordering dynamics of the Ising model on a…

无序系统与神经网络 · 物理学 2009-11-07 Denis Boyer , Octavio Miramontes

The Ginzburg-Landau model below its critical temperature in a temporally oscillating external field is studied both theoretically and numerically. As the frequency or the amplitude of the external force is changed, a nonequilibrium phase…

统计力学 · 物理学 2009-10-31 H. Fujisaka , H. Tutu , P. A. Rikvold

A numerical framework is developed to model contrail formation in the near-field exhaust of aircraft engines, resolving non-equilibrium phase transitions in compressible, multi-component, non-ideal fluid flows. The approach combines…

流体动力学 · 物理学 2025-04-30 Katharina Tegethoff , Andrew P. S. Wheeler

We consider a mesoscopic mechanism of the exchange interaction in a system of alternating ferromagnetic/nonmagnetic metallic layers. In the case of small mesoscopic samples the sign and the amplitude of the exchange energy turn out to be…

凝聚态物理 · 物理学 2007-05-23 B. Spivak , A. Zyuzin

We consider a regular random network where each node has exactly three neighbours. Ising spins at the network nodes interact antiferromagnetically along the links. The clustering coefficient $C$ is tuned from zero to 1/3 by adding new…

无序系统与神经网络 · 物理学 2009-06-17 Anna Manka-Krason , Krzysztof Kulakowski

We report on a novel and flexible experiment to investigate the non-equilibrium melting behaviour of model crystals made from charged colloidal spheres. In a slit geometry polycrystalline material formed in a low salt region is driven by…

软凝聚态物质 · 物理学 2015-05-13 Enrique Villanova-Vidal , Thomas Palberg , Hans Joachim Schöpe , Hartmut Löwen

Motivated by the anisotropic interactions between fish, we implement spatially anisotropic and therefore non-reciprocal interactions in the 2D Ising model. First, we show that the model with non-reciprocal interactions alters the system…

软凝聚态物质 · 物理学 2023-05-10 Daniel S. Seara , Akash Piya , A. Pasha Tabatabai

We study the low energy behavior of the one dimensional Hubbard model across the Mott metal-insulator phase transition in an external magnetic field. In particular we calculate elements of the dressed charge matrix at the critical point of…

强关联电子 · 物理学 2008-01-08 Holger Frahm , Temo Vekua

We investigate a multipartite ferromagnetic model without self-interactions between spins of the same party, so that the Hamiltonian is not a definite quadratic form of the magnetisations. We find the free energy and study the phase…

数学物理 · 物理学 2016-04-20 Giuseppe Genovese , Daniele Tantari

We report on the transition from magnetic edge to electric edge transport in a split magnetic gate device which applies a notch magnetic field to a two-dimensional electron gas. The gate bias allows tuning the overlap of magnetic and…

介观与纳米尺度物理 · 物理学 2017-08-09 Alain Nogaret , Puja Mondal , Ankip Kumar , Sankalpa Ghosh , Harvey Beere , David Ritchi

The theory of phase transitions is based on the consideration of "idealized" models, such as the Ising model: a system of magnetic moments living on a cubic lattice and having only two accessible states. For simplicity the interaction is…

统计力学 · 物理学 2011-12-22 H Chamati , S Romano

We investigate the nonequilibrium stationary state (NESS) of the two-dimensional Ising model under a stochastic dichotomous modulation of temperature, which alternates between $T_c \pm \delta$ around the critical temperature $T_c$ at a rate…

统计力学 · 物理学 2026-03-18 Debraj Dutta , Ritwick Sarkar , Urna Basu

In this article, we investigate the thermal equilibration of the holographic QCD model dual to the Einstein-Maxwell-Dilaton (EMD) gravity in the presence of an external electric field. The model captures the QCD features at finite…

高能物理 - 理论 · 物理学 2025-06-30 Sara Heshmatian , Fatemeh Ahmadi , Alexander Trounev
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