Fluctuation theorems for multipartite quantum coherence and correlation dynamics

TL;DR

This paper extends fluctuation theorems to quantum multipartite information, coherence, and correlations, providing new theoretical insights and experimental verification protocols for nonequilibrium quantum information dynamics.

Contribution

It introduces quantum fluctuation theorems for multipartite coherence and correlations without thermodynamic constraints, expanding the scope of fluctuation theorems.

Findings

Derived quantum fluctuation theorems for multipartite coherence and correlations.

Verified the theorems with three-qubit examples.

Proposed experimental verification protocols.

Abstract

Fluctuation theorems establish exact relations for nonequilibrium dynamics, profoundly advancing the field of stochastic thermodynamics. In this work, we extend quantum fluctuation theorems beyond the traditional thermodynamic framework to quantum multipartite information dynamics, where both the system and the environment are multipartite without assuming any thermodynamic constraints. Based on the two-point measurement scheme and the classical probability, we establish the fluctuation theorem for the dynamics of classical multipartite mutual information. By extending to quasiprobability, we derive quantum fluctuation theorems for multipartite coherence and quantum correlations, presenting them in both integral and detailed forms. Our theoretical results are illustrated and verified using three-qubit examples, and feasible experimental verification protocols are proposed. These findings uncover the statistical structure underlying the nonequilibrium quantum information dynamics, providing fundamental insights and alternative tools for advancing quantum technologies.