Dissipation induced ergodic-nonergodic transitions in finite-height mosaic Wannier-Stark lattices

TL;DR

This paper explores how dissipation can induce transitions between ergodic and nonergodic states in finite-height mosaic Wannier-Stark lattices, revealing a new way to control localization phenomena in disorder-free quantum systems.

Contribution

It demonstrates that dissipation can be used to steer the system into specific ergodic or nonergodic states, providing a novel method for manipulating quantum localization.

Findings

Dissipation influences the steady state, leading to ergodic or nonergodic behavior.

Dissipation can induce transitions between ergodic and nonergodic states.

Steady states are independent of initial conditions under specific dissipation.

Abstract

Recent research has observed the occurrence of pseudo-mobility edge (ME) within a modulated mosaic model incorporating the Wannier-Stark potential. This pseudo-ME, which signifies the critical energy that distinguishes between ergodic and weakly ergodic, or weakly ergodic and nonergodic states, is a crucial concept in comprehending the transport and localization phenomena in Wannier-Stark systems. Here we investigate the influence of dissipation on a finite-height mosaic Wannier-Stark lattice that features such pseudo-MEs by computing the steady state density matrix. Our findings indicate that particular dissipation can steer the system into specific states, regardless of its initial state, predominantly characterized by either ergodic or nonergodic states. This suggests that dissipation can be harnessed as a novel method for inducing transitions between these states and manipulating particle localization behaviors in disorder-free systems.