Quantum quenches with integrable pre-quench dynamics

TL;DR

This paper studies the dynamics of one-dimensional quantum systems with integrable pre-quench conditions, focusing on how sudden parameter changes affect their evolution, especially within the framework of massive quantum field theories.

Contribution

It provides a perturbative analysis of quantum quenches in integrable systems with a continuum limit described by massive quantum field theories.

Findings

Analyzes unitary evolution post-quench in integrable models

Develops perturbative methods for quantum quenches

Highlights effects of integrability on non-equilibrium dynamics

Abstract

We consider the unitary time evolution of a one-dimensional quantum system which is in a stationary state for negative times and then undergoes a sudden change (quench) of a parameter of its Hamiltonian at t=0. For systems possessing a continuum limit described by a massive quantum field theory we investigate in general perturbative quenches for the case in which the theory is integrable before the quench.