Spin diffusion in a perturbed isotropic Heisenberg spin chain

被引：9

作者：

Nandy, S. ^{[1
]}

Lenarcic, Z. ^{[1
]}

Ilievski, E. ^{[2
]}

Mierzejewski, M. ^{[3
]}

Herbrych, J. ^{[3
]}

Prelovsek, P. ^{[1
]}

机构：

[1] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

[2] Univ Ljubljana, Fac Math & Phys, Jadranska Ulica 19, Ljubljana 1000, Slovenia

[3] Wroclaw Univ Sci & Technol, Fac Fundamental Problems Technol, Dept Theoret Phys, PL-50370 Wroclaw, Poland

来源：

PHYSICAL REVIEW B | 2023年 / 108卷 / 08期

关键词：

TRANSPORT;

D O I：

10.1103/PhysRevB.108.L081115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The isotropic Heisenberg chain represents a particular case of an integrable many-body system exhibiting superdiffusive spin transport at finite temperatures. Here, we show that this model has distinct properties also at finite magnetization m not equal 0, even upon introducing the SU(2) invariant perturbations. Specifically, we observe nonmonotonic dependence of the diffusion constant D-0(Delta) on the spin anisotropy Delta, with a pronounced maximum at Delta = 1. The latter dependence remains true also in the zero magnetization sector, with superdiffusion at Delta = 1 that is remarkably stable against isotropic perturbation (at least in finite-size systems), consistent with recent experiments with cold atoms.

引用

页数：6

共 49 条

[41] Detection of Kardar-Parisi-Zhang hydrodynamics in a quantum Heisenberg spin-1/2 chain [J].