Semiclassical bounds on the dynamics of two-dimensional interacting disordered fermions

Semiclassical bounds on the dynamics of two-dimensional interacting disordered fermions
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二维相互作用无序费米子动力学的半经典界

DOI:
10.1103/physrevb.107.064202
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发表时间:
2023
期刊:
影响因子:
3.7
通讯作者:
Sajna, Adam S.
Sajna, Adam S.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Iwanek, Łukasz;Mierzejewski, Marcin;Polkovnikov, Anatoli;Sels, Dries;Sajna, Adam S.

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利用截断Wigner近似(TWA)研究了无自旋费米子与势无序相互作用的二维晶格系统的猝灭动力学。首先,我们证明了半经典动力学一般比全量子动力学弛豫得快。我们通过比较半经典动力学与精确对角化和一维链的Lanczos传播得到了这一结果。接下来,利用TWA模拟大晶格的能力,我们研究了驰豫速率如何依赖于所研究系统的维度。我们发现,强无序的一维和二维系统表现出一种瞬时的时间对数弛豫,这是最近为一维链建立的。这种松弛对应于强烈无序的声名狼藉的噪音。
Using the truncated Wigner approximation (TWA) we study quench dynamics of two-dimensional lattice systems consisting of interacting spinless fermions with potential disorder. First, we demonstrate that the semiclassical dynamics generally relaxes faster than the full quantum dynamics. We obtain this result by comparing the semiclassical dynamics with exact diagonalization and Lanczos propagation of one-dimensional chains. Next, exploiting the TWA capabilities of simulating large lattices, we investigate how the relaxation rates depend on the dimensionality of the studied system. We show that strongly disordered one-dimensional and two-dimensional systems exhibit a transient, logarithmic-in-time relaxation, which was recently established for one-dimensional chains. Such relaxation corresponds to the infamousnoise at strong disorder.
DOI: 10.1209/0295-5075/119/37003
发表时间: 2017-08-01
期刊: EPL
影响因子: 1.8
作者:
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DOI: --
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