The Jaynes Cummings model as an autonomous Maxwell demon
Quantum Physics
2025-12-11 v4
Abstract
We revisit the Jaynes-Cummings model as an autonomous thermodynamic machine, where a qubit is driven by a cavity containing initially a large coherent field. Our analysis reveals a transition between the expected behavior of ideal-work source of the cavity at short times, and a long-time dynamics where the cavity autonomously measures the qubit and exerts a result-dependent drive. This autonomous feedback then purifies the qubit irrespective of its initial state. We show that the cavity functions thermodynamically as an autonomous Maxwell demon, trading mutual information for cooling power.
Cite
@article{arxiv.2502.10344,
title = {The Jaynes Cummings model as an autonomous Maxwell demon},
author = {Yashovardhan Jha and Dragi Karevski and Cyril Elouard},
journal= {arXiv preprint arXiv:2502.10344},
year = {2025}
}