Zamora A, Lad N, Szymanska M H
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
Phys Rev Lett. 2020 Dec 31;125(26):265701. doi: 10.1103/PhysRevLett.125.265701.
We study the dynamics of vortices in a two-dimensional, nonequilibrium system, described by the compact Kardar-Parisi-Zhang equation, after a sudden quench across the critical region. Our exact numerical solution of the phase-ordering kinetics shows that the unique interplay between nonequilibrium and the variable degree of spatial anisotropy leads to different critical regimes. We provide an analytical expression for the vortex evolution, based on scaling arguments, which is in agreement with the numerical results, and confirms the form of the interaction potential between vortices in this system.
我们研究了一个二维非平衡系统中涡旋的动力学，该系统由紧致的 Kardar-Parisi-Zhang 方程描述，在跨越临界区域的突然淬火之后。我们对相序动力学的精确数值解表明，非平衡与空间各向异性可变程度之间独特的相互作用导致了不同的临界状态。基于标度论证，我们给出了涡旋演化的解析表达式，它与数值结果一致，并证实了该系统中涡旋间相互作用势的形式。
