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Quantum Information Processing

Quantum Carnot cycle with inner friction

  • 01-08-2020
Published in:
Authors
Selçuk Çakmak
Ferdi Altintas
Published in
Quantum Information Processing | Issue 8/2020

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Abstract

A single driven spin is investigated as the working substance of a six-stroke irreversible quantum Carnot cycle. The role of inner friction associated with the finite-time adiabatic transformations on the cycle efficiency and the harvested work are investigated in detail. The inner friction is found to significantly reduce the work output and the cycle efficiency which can make the engine incapable to produce positive work for the too fast adiabatic transformations. The ideal Carnot efficiency is found to be reached only for the quasistatic transformations. A deviation of the cycle efficiency from the classical Carnot efficiency has been given by an efficiency lag which is directly related to the total entropy production due to the inner friction. The released heat in the relaxation processes of the cycle is associated with the entropy production and the inner friction. The extension of the results for a scale-invariant quantum working substance and the possible experimental implementation of the irreversible quantum Carnot cycle in a liquid-state nuclear magnetic resonance setup are also discussed.

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previous article q-Deformed three-level quantum logic
next article Classical benchmarking of Gaussian Boson Sampling on the Titan supercomputer
Title
Quantum Carnot cycle with inner friction
Authors
Selçuk Çakmak
Ferdi Altintas
Publication date
01-08-2020
Publisher
Springer US
Published in
Quantum Information Processing / Issue 8/2020
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-020-02746-x
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