Electronic Refrigeration at the Quantum Limit

Andrey V. Timofeev, Meri Helle, Matthias Meschke, Mikko Möttönen, and Jukka P. Pekola
Phys. Rev. Lett. 102, 200801 – Published 18 May 2009

Abstract

We demonstrate quantum-limited electronic refrigeration of a metallic island in a low-temperature microcircuit. We show that matching the impedance of the circuit enables refrigeration at a distance, of about 50μm in our case, through superconducting leads with a cooling power determined by the quantum of thermal conductance. In a reference sample with a mismatched circuit this effect is absent. Our results are consistent with the concept of electromagnetic heat transport. We observe and analyze the crossover between electromagnetic and quasiparticle heat flux in a superconductor.

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  • Received 14 February 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.200801

©2009 American Physical Society

Authors & Affiliations

Andrey V. Timofeev1,2, Meri Helle1, Matthias Meschke1, Mikko Möttönen1,3,4, and Jukka P. Pekola1

  • 1Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 3500, 02015 TKK, Finland
  • 2Laboratory of Superconductivity, Institute of Solid State Physics, Chernogolovka, 142432 Russia
  • 3Department of Applied Physics, Helsinki University of Technology, P.O. Box 5100, 02015 TKK, Finland
  • 4Australian Research Council Centre of Excellence for Quantum Computer Technology, The University of New South Wales, Sydney 2052, Australia

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Issue

Vol. 102, Iss. 20 — 22 May 2009

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