Solving the kinetic Ising model with nonreciprocity.

IF 2.2 3区 物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS
Gabriel Artur Weiderpass, Mayur Sharma, Savdeep Sethi
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引用次数: 0

Abstract

Nonreciprocal interactions are a generic feature of nonequilibrium systems. We define a nonreciprocal generalization of the kinetic Ising model in one spatial dimension. We solve the model exactly using two different approaches for infinite, semi-infinite, and finite systems with either periodic or open boundary conditions. The exact solution allows us to explore a range of novel phenomena tied to nonreciprocity like nonreciprocity induced frustration and wave phenomena with interesting parity-dependence for finite systems of size N. We study dynamical questions like the approach to equilibrium with various boundary conditions. We find different regimes, separated by Nth-order exceptional points, which can be classified as overdamped, underdamped, or critically damped phases. Despite these different regimes, long-time order is only present at zero temperature. Additionally, we explore the low-energy behavior of the system in various limits, including the aging and spatiotemporal Porod regimes, demonstrating that nonreciprocity induces unique scaling behavior at zero temperature. Lastly, we present general results for systems where spins interact with no more than two spins, outlining the conditions under which long-time order may exist.

求解非互易的动力学Ising模型。
非互反相互作用是非平衡系统的一个普遍特征。我们在一个空间维度上定义了动力学Ising模型的非互反推广。对于具有周期边界条件或开放边界条件的无限、半无限和有限系统,我们使用两种不同的方法精确地求解模型。精确解允许我们探索一系列与非互易相关的新现象,如非互易诱导挫折和具有有趣的奇偶依赖的波动现象,对于大小为n的有限系统。我们研究动态问题,如各种边界条件下的平衡方法。我们发现不同的状态,由n阶异常点分开,可以分类为过阻尼,欠阻尼或临界阻尼阶段。尽管有这些不同的制度,长时间的秩序只存在于零温度。此外,我们探索了系统在各种极限下的低能量行为,包括老化和时空孔隙状态,证明了非互易性在零温度下诱导了独特的缩放行为。最后,我们给出了自旋与不超过两个自旋相互作用的系统的一般结果,概述了可能存在长序的条件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Physical Review E
Physical Review E PHYSICS, FLUIDS & PLASMASPHYSICS, MATHEMAT-PHYSICS, MATHEMATICAL
CiteScore
4.50
自引率
16.70%
发文量
2110
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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