Cooling by Cooper pair splitting

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2018-12-28
Department
Department of Applied Physics
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Language
en
Pages
4
1-6
Series
Physical Review B, Volume 98, issue 24
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.
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| openaire: EC/H2020/743884/EU//DiracEntangler
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DOI
10.1103/PhysRevB.98.241414
Citation
Sanchez, R, Burset Atienza, P & Levy Yeyati, A 2018, ' Cooling by Cooper pair splitting ', Physical Review B, vol. 98, no. 24, 241414, pp. 1-6 . https://doi.org/10.1103/PhysRevB.98.241414
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https://urn.fi/URN:NBN:fi:aalto-201901141113
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[article-cris] Perustieteiden korkeakoulu / SCI