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Patrick Potts

Postdoctoral fellow

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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

Summary, in 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.

Publishing year





Physical Review B



Document type

Journal article


American Physical Society




  • ISSN: 2469-9950