Thermodynamics of a Phase-Driven Proximity Josephson Junction

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 c...

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Bibliographic Details
Published inEntropy (Basel, Switzerland) Vol. 21; no. 10; p. 1005
Main Authors Vischi, Francesco, Carrega, Matteo, Braggio, Alessandro, Virtanen, Pauli, Giazotto, Francesco
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.10.2019
MDPI
Subjects
Energy
Equations of state
Equilibrium
Heat
Heat exchange
Investigations
josephson junction
Josephson junctions
josephson thermodynamics
maxwell relation
proximity effect
Proximity effect (electricity)
quantum coolers
quantum machines
quantum thermodynamics
quasi-particles entropy
sns junction
superconductivity
Thermodynamic properties
Thermodynamics
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Summary: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.
ISSN:1099-4300
1099-4300
DOI:10.3390/e21101005