Driven quantum coarsening

TL;DR

This paper investigates the non-equilibrium dynamics of quantum coarsening in driven systems, revealing universal slow relaxation behavior and classical-like dynamics at large scales, applicable to various driven quantum systems.

Contribution

It derives a phase diagram for driven quantum coarsening models and demonstrates the universality of slow relaxation and classical dynamics in non-equilibrium quantum systems.

Findings

Universal slow relaxation in the ordered phase

Dynamics resemble classical stochastic processes at large scales

Results applicable to generic driven quantum coarsening systems

Abstract

We study the driven dynamics of quantum coarsening. We analyze models of M-component rotors coupled to two electronic reservoirs at different chemical potentials that generate a current threading through the system. In the large M limit we derive the dynamical phase diagram as a function of temperature, strength of quantum fluctuations, voltage and coupling to the leads. We show that the slow relaxation in the ordering phase is universal. On large time and length scales the dynamics are analogous to stochastic classical ones, even for the quantum system driven out of equilibrium at zero temperature. We argue that our results apply to generic driven quantum coarsening.