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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2012

Microwave spectroscopy of a Cooper pair beam splitter

Audrey Cottet

Résumé

This article discusses how to demonstrate the entanglement of the split Cooper pairs produced in a double-quantum-dot based Cooper pair beam splitter (CPS), by performing the microwave spectroscopy of the CPS. More precisely, one can study the DC current response of such a CPS to two on-phase microwave gate irradiations applied to the two CPS dots. Some of the current peaks caused by the microwaves show a strongly nonmonotonic variation with the amplitude of the irradiation applied individually to one dot. This effect is directly due to a subradiance property caused by the coherence of the split pairs. Using realistic parameters, one finds that this effect has a measurable amplitude.

Dates et versions

hal-00744675 , version 1 (23-10-2012)

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Audrey Cottet. Microwave spectroscopy of a Cooper pair beam splitter. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 86, pp.075107. ⟨10.1103/PhysRevB.86.075107⟩. ⟨hal-00744675⟩
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