Cooling by Cooper pair splitting

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Researchers

Research units

  • Universidad Autonoma de Madrid, Theoretical Condensed Matter Physics, Madrid

Abstract

The electrons forming a Cooper pair in a superconductor can be spatially separated preserving their spin entanglement by means of quantum dots coupled to both the superconductor and independent normal leads. We investigate the thermoelectric properties of such a Cooper pair splitter and demonstrate that cooling of a reservoir is an indication of nonlocal correlations induced by the entangled electron pairs. Moreover, we show that the device can be operated as a nonlocal thermoelectric heat engine. Both as a refrigerator and as a heat engine, the Cooper pair splitter reaches efficiencies close to the thermodynamic bounds. As such, our work introduces an experimentally accessible heat engine and a refrigerator driven by entangled electron pairs in which the role of quantum correlations can be tested.

Details

Original languageEnglish
Article number241414
Pages (from-to)1-6
Number of pages4
JournalPhysical Review B
Volume98
Issue number24
Publication statusPublished - 28 Dec 2018
MoE publication typeA1 Journal article-refereed

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