Nonequilibrium many-body dynamics in supersymmetric quenching

TL;DR

This paper investigates the nonequilibrium dynamics of ultracold quantum many-body systems undergoing a quench between supersymmetric Hamiltonians, revealing unique revival phenomena and robustness at finite temperatures.

Contribution

It introduces a method to analyze dynamics based solely on the initial state in supersymmetric quenches and demonstrates many-body revivals in a fermionic gas example.

Findings

Observation of many-body revivals in survival probability

Revivals are robust at finite temperatures

Contrast with Talbot effect in quadratic spectra

Abstract

We study the dynamics induced by quenching an ultracold quantum many-body system between two supersymmetric Hamiltonians. Such a quench can be created by carefully changing the external trapping potential and leads to a situation where the eigenspectra before and after the quench are nearly identical. We show that the dynamics originating from this can be conveniently described using knowledge about the initial state only and apply this insight to the specific example of a fermionic gas that is initially trapped in an infinite box potential. Quenching to different, higher order supersymmetric partners potentials we observe the appearance of many-body revivals in the survival probability and show that some of these are robust at finite temperatures. This is in contrast to the well known Talbot effect, which is the standard example for quenching into a system with a quadratic spectrum.