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Cooling by Cooper pair splitting
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DOI：10.1103/PhysRevB.98.241414.png)
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摘要
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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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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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Spin-resolved Andreev transport through double-quantum-dot Cooper pair splitters.png)
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