Scar states in deconfined Z2 lattice gauge theories

被引：31

作者：

Aramthottil, Adith Sai ^{[1
]}

Bhattacharya, Utso ^{[2
]}

Gonzalez-Cuadra, Daniel ^{[2
,3
,4
]}

Lewenstein, Maciej ^{[2
,5
]}

Barbiero, Luca ^{[2
,6
]}

Zakrzewski, Jakub ^{[1
,7
]}

机构：

[1] Uniwersytet Jagiellonski, Inst Fizyki Teoretycznej, Lojasiewicza 11, PL-30348 Krakow, Poland

[2] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Ave Carl Friedrich Gauss 3, E-08860 Castelldefels, Barcelona, Spain

[3] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

[4] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria

[5] ICREA, Passeig Lluis Co 23, E-08010 Barcelona, Spain

[6] Politecn Torino, DISAT, Inst Condensed Matter Phys & Complex Syst, I-10129 Turin, Italy

[7] Uniwersytet Jagiellonski, Mark Kac Complex Syst Res Ctr, PL-30348 Krakow, Poland

来源：

PHYSICAL REVIEW B | 2022年 / 106卷 / 04期

关键词：

QUANTUM; DYNAMICS; SIMULATIONS; SYMMETRIES; INVARIANCE; SYSTEMS;

D O I：

10.1103/PhysRevB.106.L041101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The weak ergodicity breaking induced by quantum many-body scars (QMBSs) represents an intriguing concept that has received great attention in recent years due to its relation to unusual nonequilibrium behavior. Here, we reveal that this phenomenon can occur in a particular regime of a lattice gauge theory, where QMBSs emerge due to the presence of an extensive number of local constraints. In particular, by analyzing the gauged Kitaev model, we provide an example where QMBSs appear in a regime where charges are deconfined. By means of both numerical and analytical approaches, we find a variety of scarred states far away from the regime where the model is integrable. The presence of these states is revealed both by tracing them directly from the analytically reachable limit, as well as by quantum quenches showing persistent oscillations for specific initial states.

引用

页数：6

共 73 条

[11] SMOOTHED WAVE-FUNCTIONS OF CHAOTIC QUANTUM-SYSTEMS [J].