Fluctuation of heat current in Josephson junctions
arXiv:1405.1362 · doi:10.1063/1.4914077
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. Curiously, phase dependence reappears if phase coherence is partially broken.
arXiv comment7 pages, 7 figures
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- Thermal signature of Majorana fermions in Josephson junction
- Optimal non-invasive measurement of Full Counting Statistics by a single qubit