Disorder-free localization in a simple U (1) lattice gauge theory

Article

关键词: MANY-BODY LOCALIZATION;    MASSIVE SCHWINGER MODEL;    STATISTICAL-MECHANICS;    INVARIANCE;    THERMALIZATION;    INSULATOR;    FERMIONS;    ABSENCE;    CHAOS;   

DOI  :  10.1103/PhysRevB.102.165132

来源: SCIE

【 摘 要 】

Localization due to the presence of disorder has proven crucial for our current understanding of relaxation in isolated quantum systems. The many-body localized phase constitutes a robust alternative to the thermalization of complex interacting systems, but recently the importance of disorder has been brought into question. A number of disorder-free localization mechanisms have been put forward connected to local symmetries of lattice gauge theories. Here, starting from translationally invariant (1 + 1)-dimensional quantum electrodynamics, we modify the dynamics of the gauge field which allows us to construct a lattice model with a U(1) local gauge symmetry revealing a mechanism of disorder-free localization. We consider two different discretizations of the continuum model resulting in a free-fermion soluble model in one case and an interacting model in the other. We diagnose the localization of our translationally invariant model in the far-from-equilibrium dynamics following a global quantum quench.

【 授权许可】

Free