Phase-coherent heat circulators with normal or superconducting contacts

Physical review. B./Physical review. B, vol. 103

Abstract

We investigate heat circulators where a phase coherent region is contacted by three leads that are either normal- or superconducting. A magnetic field, and potentially the superconducting phases, allow to control the preferential direction of the heat flow between the three-different temperature-biased contacts. The main goal of this study is to analyze the requirements for heat circulation in nonideal devices, in particular focusing on sample-to-sample variations. Quite generally, we find that the circulation performance of the devices is good as long as only a few transport channels are involved. We compare the performance of circulators with normal conducting contacts to those with superconducting contacts and find that the circulation coefficients are essentially unchanged.

Authors 4

1. Matteo Acciai

   Chalmers University of Technology

   Affiliation as printed

   Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, S-412 96 Göteborg, Sweden

2. Fatemeh Hajiloo

   Chalmers University of Technology

   Affiliation as printed

   Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, S-412 96 Göteborg, Sweden

3. Fabian Hassler Aachen JARA-Institute for Quantum Information

   RWTH Aachen University

   Affiliation as printed

   JARA Institute for Quantum Information, RWTH Aachen University, 52056 Aachen, Germany

4. Janine Splettstoesser

   Chalmers University of Technology

   Affiliation as printed

   Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, S-412 96 Göteborg, Sweden