Quantum Equivalence and Quantum Signatures in Heat Engines
Abstract
Quantum heat engines (QHE) are thermal machines where the working substance is quantum. In the extreme case the working medium can be a single particle or a few level quantum system. The study of QHE has shown a remarkable similarity with the standard thermodynamical models, thus raising the issue what is quantum in quantum thermodynamics. Our main result is thermodynamical equivalence of all engine type in the quantum regime of small action. They have the same power, the same heat, the same efficiency, and they even have the same relaxation rates and relaxation modes. Furthermore, it is shown that QHE have quantum-thermodynamic signature, i.e thermodynamic measurements can confirm the presence of quantum coherence in the device. The coherent work extraction mechanism enables power outputs that greatly exceed the power of stochastic (dephased) engines.
Keywords
Cite
@article{arxiv.1502.06592,
title = {Quantum Equivalence and Quantum Signatures in Heat Engines},
author = {Raam Uzdin and Amikam Levy and Ronnie Kosloff},
journal= {arXiv preprint arXiv:1502.06592},
year = {2015}
}
Comments
v2 contains style and figures improvements. Subsection III.D was added