Non-equilibrium and equilibrium thermodynamic foundations of the 2D toric code within the SEAQT framework

TL;DR

This paper investigates the non-equilibrium relaxation dynamics of the 2D toric code using the SEAQT framework, linking out-of-equilibrium quantum information measures to thermodynamic behavior.

Contribution

It introduces a novel application of the SEAQT framework to study the relaxation process of the 2D toric code, connecting thermodynamics with quantum information out of equilibrium.

Findings

Describes the dynamics of the toric code towards equilibrium.

Links out-of-equilibrium information measures with thermodynamic properties.

Abstract

The 2D toric code is a prototypical example that exhibits non-trivial topological properties and a ground state possessing a non-trivial topological order. Until now, all the cases studied in the literature have been in the stable equilibrium regime, leaving the relaxation towards this state unexplored. In the present work, the dynamics of the toric code towards stable equilibrium is explored within the steepest-entropy-ascent quantum thermodynamic (SEAQT) framework. Under these dynamics, information correlations such as the relative entropy, logarithmic negativity, magnetization, coherent information, and geometric entropy are described out of equilibrium, permitting a connection to be made between the out-of-equilibrium dynamics and these information measures.