Quenches and lattice simulators for particle creation

TL;DR

This paper introduces a framework for simulating thermal particle creation in condensed matter systems using quantum quenches, supported by analytical and numerical studies of fermionic models showing approximate thermalization.

Contribution

It proposes a novel method to emulate thermal particle production through quantum quenches in lattice systems, with analytical and numerical validation.

Findings

Observables related to Unruh--de Witt detectors show approximate thermalization.

The framework is applicable in one and two-dimensional quadratic fermionic systems.

Numerical simulations support the feasibility of simulating particle creation via quenches.

Abstract

In this paper we propose a framework for simulating thermal particle production in condensed matter systems. The procedure we describe can be realized by means of a quantum quench of a parameter in the model. In order to support this claim, we study quadratic fermionic systems in one and two dimensions by means of analytical and numerical techniques. In particular, we are able to show that a class of observables associated to Unruh--de Witt detectors are very relevant for this type of setup and that exhibit approximate thermalization.