Alternative experimental ways to access entropy production
Abstract
We theoretically derive and experimentally compare several different ways to access entropy production in a quantum process under feedback control. We focus on a bipartite quantum system realizing an autonomous Maxwell's demon scheme reported by Najera-Santos et al. [Phys.~Rev.~Research 2, 032025(R) (2020)], where information encoded in a demon is consumed to transfer heat from a cold qubit to a hot cavity. By measuring individual quantum trajectories of the joint demon-cavity-qubit system, we compute the entropy production with six distinct expressions derived from different approaches to the system description and its evolution. Each method uses a specific set of trajectories and data processing. Our results provide a unified view on the various meanings of irreversibility in quantum systems and pave the way to the measurement of entropy production beyond thermal frameworks.
Cite
@article{arxiv.2012.13640,
title = {Alternative experimental ways to access entropy production},
author = {Zheng Tan and Patrice A. Camati and Guillaume Coeuret Cauquil and Alexia Auffèves and Igor Dotsenko},
journal= {arXiv preprint arXiv:2012.13640},
year = {2021}
}
Comments
15 pages, 10 figures