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TT: Fachverband Tiefe Temperaturen

TT 9: Quantum Dots, Quantum Wires, Point Contacts

TT 9.2: Talk

Monday, March 12, 2018, 10:00–10:15, HFT-FT 101

Phase-dependent heat transport through superconductor-quantum dot hybrids — •Mathias Kamp and Björn Sothmann — Theoretische Physik, Universität Duisburg-Essen and CENIDE, D-47048 Duisburg, Germany

Phase-coherent charge transport in mesoscopic systems has received a lot of attention in past decades. Although phase-dependent heat currents through Josephson junctions have been predicted [1] and observed recently [2], phase-coherent heat transport has largely been neglected so far. Here, we consider a junction consisting of a quantum dot tunnel coupled to two superconducting leads. The system combines the interplay of superconducting correlations and strong Coulomb interaction on the dot in a nonequilibrium situation. We derive a generalized master equation using a real-time diagrammatic approach and calculate the phase-dependent heat and charge current in linear and nonlinear response.
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F. Giazotto and M. J. Martínez-Pérez, Nature 492, 401 (2012).