Quantum fluctuation theorems beyond two-point measurements

TL;DR

This paper develops quantum fluctuation theorems for heat exchange in correlated systems that preserve quantum features, extending beyond traditional measurement schemes.

Contribution

It introduces a new framework using dynamic Bayesian networks to derive fluctuation theorems that retain quantum correlations and coherence.

Findings

Fluctuation theorems valid for quantum correlated systems.

Preservation of quantum coherence in fluctuation relations.

Extension beyond two-point measurement scheme.

Abstract

We derive detailed and integral quantum fluctuation theorems for heat exchange in a quantum correlated bipartite thermal system using the framework of dynamic Bayesian networks. Contrary to the usual two-projective-measurement scheme that is known to destroy quantum features, these fluctuation relations fully capture quantum correlations and quantum coherence at arbitrary times.