Quench Dynamics in Two-Dimensional Integrable SUSY Models

TL;DR

This paper investigates how supersymmetry can persist during non-equilibrium quench dynamics in two-dimensional integrable quantum field theories, identifying special initial states that preserve supersymmetry and analyzing their implications.

Contribution

It identifies conditions for initial states that maintain supersymmetry during quantum quenches in 2D integrable SUSY models and applies these to specific models like Tricritical Ising and Sine-Gordon.

Findings

Certain initial states preserve supersymmetry during quenches.

Supersymmetric initial states are characterized and identified.

Implications for the Generalized Gibbs Ensemble are discussed.

Abstract

We analyse quench processes in two dimensional quantum field theories with infinite number of conservation laws which also include fermionic charges that close a $N=1$ supersymmetric algebra. While in general the quench protocol induces a breaking of supersymmetry, we show that there are particular initial states which ensure the persistence of supersymmetry also for the dynamics out of equilibrium. We discuss the conditions that identify such states and, as application, we present the significant cases of the Tricritical Ising Model and the Sine-Gordon model at its supersymmetric point. We also address the issue of the Generalized Gibbs Ensemble in the presence of fermionic conserved charges.