Thermal transport through ac-driven transparent Josephson weak links

P. Virtanen; F. Giazotto

doi:10.1103/PhysRevB.90.014511

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Thermal transport through ac-driven transparent Josephson weak links

P. Virtanen, F. Giazotto

DOI 10.1103/PhysRevB.90.014511 · Physical Review B

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Abstract

We discuss how phase coherence manifests in the heat transport through superconducting single and multichannel Josephson junctions in time-dependent situations. We consider the heat current driven through the junction by a temperature difference in dc voltage and ac phase biased situations. At low bias, the electromagnetic driving mainly modifies the form of the coherent resonance that transports a large part of the heat current, rather than simply dissipating energy in the junction. We find a description for the heat current in terms of quasiparticle n-photon absorption and emission rates, and discuss analytical and numerical results concerning them. In addition to the ensemble average heat transport, we describe also its fluctuations.