Sudden quenches in quasiperiodic Ising model

TL;DR

This paper investigates the non-equilibrium dynamics of a quasiperiodic Ising model, revealing how entanglement entropy evolves after quenches and correlates with the nature of low-energy excitations in different phases.

Contribution

It provides new insights into the entanglement dynamics of quasiperiodic systems and links these dynamics to the phases' excitation properties.

Findings

Entanglement entropy evolution varies with phase type.

Quenches reveal the nature of excitations in each phase.

Results align with previous excitation characterizations.

Abstract

We present here the non-equilibrium dynamics of the recently studied quasiperiodic Ising model. The zero temperature phase diagram of this model mainly consists of three phases, where each of these three phases can have extended, localized or critically delocalized low energy excited states. We explore the nature of excitations in these different phases by studying the evolution of entanglement entropy after performing quenches of different strengths to different phases. Our results on non-equilibrium dynamics of entanglement entropy are concurrent with the nature of excitations discussed in Ref. 1 in each phase.