Quantum Equivalence and Quantum Signatures in Heat Engines

By Raam Uzdin, Amikam Levy, Ronnie Kosloff. 2015

143 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/70db6d6636b669710af131ed5105652d3efabdb2

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In Atomic and Molecular Physics, and Optics

In Statistical and Nonlinear Physics

Citations in the corpus

Introduction to Quantum Thermodynamics: History and Prospects (2018, background): “Moreover the work extraction mechanism employs coherence [118].”
The role of quantum information in thermodynamics—a topical review (2015, background): “In more detail, the main idea of [233] is to find a threshold on the power of a thermal machine which would be impossible to achieve for a machine which is ‘classical’.”
The Quantum Harmonic Otto Cycle (2016, background): “Nevertheless, it can have a quantum origin for engines with propagators with small action [35, 36].”