Persistent-current states originating from the Hilbert-space fragmentation in momentum space

被引：0

作者：

Kunimi, Masaya ^{[1
,3
]}

Danshita, Ippei ^{[2
]}

机构：

[1] Natl Inst Nat Sci, Dept Photomol Sci, Inst Mol Sci, Myodaiji, Okazaki 4448585, Japan

[2] Kindai Univ, Dept Phys, Higashi Osaka, Osaka 5778502, Japan

[3] Tokyo Univ Sci, Dept Phys, Shinjuku, Tokyo 1628601, Japan

来源：

PHYSICAL REVIEW A | 2023年 / 108卷 / 06期

关键词：

QUANTUM SIMULATIONS; THERMALIZATION; SINGLE; CHAOS; FLUX;

D O I：

10.1103/PhysRevA.108.063316

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Hilbert space fragmentation (HSF) is a phenomenon wherein the Hilbert space of an isolated quantum system splits into exponentially many disconnected subsectors. The fragmented systems do not thermalize after longtime evolution because the dynamics are restricted to a small subsector. Inspired by recent developments of the HSF, we construct the Hamiltonian that exhibits the HSF in momentum space. We show that persistent-current (PC) states emerge due to the HSF in the momentum space. We also investigate the stability of the PC states against the random potential, which breaks the structure of the HSF, and find that the decay rate of the PC is almost independent of the current velocity.

引用

页数：15

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