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Autonomous quantum refrigerator in a circuit QED architecture based on a Josephson junction

  • Patrick P. Hofer
  • Martí Perarnau-Llobet
  • Jonatan Bohr Brask
  • Ralph Silva
  • Marcus Huber
  • Nicolas Brunner
Publishing year: 2016-12-16
Language: English
Publication/Series: Physical Review B
Issue: 23
Document type: Journal article
Publisher: American Physical Society

Abstract english

An implementation of a small quantum absorption refrigerator in a circuit QED architecture is proposed. The setup consists of three harmonic oscillators coupled to a Josephson junction. The refrigerator is autonomous in the sense that it does not require any external control for cooling, but only thermal contact between the oscillators and heat baths at different temperatures. In addition, the setup features a built-in switch, which allows the cooling to be turned on and off. If timing control is available, this enables the possibility for coherence-enhanced cooling. Finally, we show that significant cooling can be achieved with experimentally realistic parameters and that our setup should be within reach of current technology.


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

Postdoctoral fellow

Mathematical Physics


Postdoctoral fellow