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Open AccessArticle

Thermodynamics of a Phase-Driven Proximity Josephson Junction

1
NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy
2
Dipartimento di Fisica “E. Fermi”, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
3
Department of Physics and Nanoscience Center, University of Jyväskylä, P.O. Box 35 (YFL), FI-40014 Jyväskylä, Finland
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(10), 1005; https://doi.org/10.3390/e21101005
Received: 20 September 2019 / Revised: 11 October 2019 / Accepted: 13 October 2019 / Published: 15 October 2019
(This article belongs to the Special Issue Quantum Thermodynamics II)
We study the thermodynamic properties of a superconductor/normal metal/superconductor Josephson junction in the short limit. Owing to the proximity effect, such a junction constitutes a thermodynamic system where phase difference, supercurrent, temperature and entropy are thermodynamical variables connected by equations of state. These allow conceiving quasi-static processes that we characterize in terms of heat and work exchanged. Finally, we combine such processes to construct a Josephson-based Otto and Stirling cycles. We study the related performance in both engine and refrigerator operating mode. View Full-Text
Keywords: proximity effect; superconductivity; Josephson junction; SNS junction; Josephson thermodynamics; Maxwell relation; quasi-particles entropy; quantum thermodynamics; quantum machines; quantum coolers proximity effect; superconductivity; Josephson junction; SNS junction; Josephson thermodynamics; Maxwell relation; quasi-particles entropy; quantum thermodynamics; quantum machines; quantum coolers
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MDPI and ACS Style

Vischi, F.; Carrega, M.; Braggio, A.; Virtanen, P.; Giazotto, F. Thermodynamics of a Phase-Driven Proximity Josephson Junction. Entropy 2019, 21, 1005.

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