Electronic refrigeration at the quantum limit

Andrey Timofeev, Meri Helle, Matthias Meschke, Mikko Möttönen, Jukka Pekola

Research output: Contribution to journalArticleScientificpeer-review

72 Citations (Scopus)
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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 50  μm 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.
Original languageEnglish
Article number200801
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Issue number20
Publication statusPublished - 18 May 2009
MoE publication typeA1 Journal article-refereed


  • electronic refrigeration
  • heat transport
  • quantum limit


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