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Quantum heat engine based on photon-assisted Cooper pair tunneling

  • Patrick P. Hofer
  • J. R. Souquet
  • A. A. Clerk
Publishing year: 2016-01-22
Language: English
Publication/Series: Physical Review B
Volume: 93
Issue: 4
Document type: Journal article
Publisher: American Physical Society

Abstract english

We propose and analyze a simple mesoscopic quantum heat engine that exhibits both high power and high efficiency. The system consists of a biased Josephson junction coupled to two microwave cavities, with each cavity coupled to a thermal bath. Resonant Cooper pair tunneling occurs with the exchange of photons between cavities, and a temperature difference between the baths can naturally lead to a current against the voltage, and hence work. As a consequence of the unique properties of Cooper-pair tunneling, the heat current is completely separated from the charge current. This combined with the strong energy selectivity of the process leads to an extremely high efficiency.


  • ISSN: 2469-9950
Portrait of Patrick Potts
E-mail: patrick [dot] potts [at] teorfys [dot] lu [dot] se

Postdoctoral fellow

Mathematical Physics


Postdoctoral fellow