# Repeated interactions and quantum stochastic thermodynamics at strong coupling

## TL;DR

This paper develops a generalized thermodynamic framework for open quantum systems under repeated interactions and measurements, enabling experimental tests and insights into quantum stochastic processes, causal models, and the effects of strong coupling.

## Contribution

It extends quantum thermodynamics to include arbitrary measurements and strong coupling, providing a consistent framework for quantum stochastic processes and causal models.

## Key findings

- Framework applicable to strong coupling regimes
- Enables experimental testing of quantum thermodynamics
- Links non-Markovianity with nonequilibrium thermodynamics

## Abstract

The thermodynamic framework of repeated interactions is generalized to an arbitrary open quantum system in contact with a heat bath. Based on these findings the theory is then extended to arbitrary measurements performed on the system. This constitutes a direct experimentally testable framework in strong coupling quantum thermodynamics. By construction, it provides many quantum stochastic processes and quantum causal models with a consistent thermodynamic interpretation. The setting can be further used, for instance, to rigorously investigate the interplay between non-Markovianity and nonequilibrium thermodynamics.