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Quantum Information Processing

Coupled quantum Otto heat engine and refrigerator with inner friction

  • 01-08-2019
Published in:
Authors
Deniz Türkpençe
Ferdi Altintas
Published in
Quantum Information Processing | Issue 8/2019

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Abstract

We investigate two coupled spins 1/2 in a magnetic field as the working substance of the quantum Otto cycle. In the quantum adiabatic strokes, finite-time parametric transformations are employed either in the coupling strength or in the magnetic field. The operation regimes, where the mode of the cycle is a refrigerator or a heat engine, are explored. The role of the total allocated time to the quantum adiabatic stages on the performance of the quantum Otto refrigerator and the heat engine is investigated in detail. The finite-time adiabatic transformations are found to increase the Shannon entropy which is quantum in origin. The effect known as the inner friction is found to negatively effect the performances of the quantum heat engine and the refrigerator. The strong frictional losses are also found to induce inactive operation regimes where the mode of the cycle is neither a refrigerator nor a heat engine.

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previous article Growth rate of quantum knot mosaics
Title
Coupled quantum Otto heat engine and refrigerator with inner friction
Authors
Deniz Türkpençe
Ferdi Altintas
Publication date
01-08-2019
Publisher
Springer US
Published in
Quantum Information Processing / Issue 8/2019
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-019-2366-7
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