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Title: Fluctuation of heat current in Josephson junctions

Abstract

We discuss the statistics of heat current between two superconductors at different temperatures connected by a generic weak link. As the electronic heat in superconductors is carried by Bogoliubov quasiparticles, the heat transport fluctuations follow the Levitov–Lesovik relation. We identify the energy-dependent quasiparticle transmission probabilities and discuss the resulting probability density and fluctuation relations of the heat current. We consider multichannel junctions, and find that heat transport in diffusive junctions is unique in that its statistics is independent of the phase difference between the superconductors.

Authors:
 [1];  [2]
  1. Low Temperature Laboratory, Department of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 AALTO (Finland)
  2. NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa (Italy)
Publication Date:
OSTI Identifier:
22454464
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 2; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DENSITY; ENERGY DEPENDENCE; HEAT; HEAT TRANSFER; JOSEPHSON JUNCTIONS; PROBABILITY; QUASI PARTICLES; SUPERCONDUCTORS

Citation Formats

Virtanen, P., E-mail: pauli.virtanen@aalto.fi, and Giazotto, F. Fluctuation of heat current in Josephson junctions. United States: N. p., 2015. Web. doi:10.1063/1.4914077.
Virtanen, P., E-mail: pauli.virtanen@aalto.fi, & Giazotto, F. Fluctuation of heat current in Josephson junctions. United States. doi:10.1063/1.4914077.
Virtanen, P., E-mail: pauli.virtanen@aalto.fi, and Giazotto, F. Sun . "Fluctuation of heat current in Josephson junctions". United States. doi:10.1063/1.4914077.
@article{osti_22454464,
title = {Fluctuation of heat current in Josephson junctions},
author = {Virtanen, P., E-mail: pauli.virtanen@aalto.fi and Giazotto, F.},
abstractNote = {We discuss the statistics of heat current between two superconductors at different temperatures connected by a generic weak link. As the electronic heat in superconductors is carried by Bogoliubov quasiparticles, the heat transport fluctuations follow the Levitov–Lesovik relation. We identify the energy-dependent quasiparticle transmission probabilities and discuss the resulting probability density and fluctuation relations of the heat current. We consider multichannel junctions, and find that heat transport in diffusive junctions is unique in that its statistics is independent of the phase difference between the superconductors.},
doi = {10.1063/1.4914077},
journal = {AIP Advances},
number = 2,
volume = 5,
place = {United States},
year = {Sun Feb 15 00:00:00 EST 2015},
month = {Sun Feb 15 00:00:00 EST 2015}
}