Subradiant split Cooper pairs

Audrey Cottet (1) , Takis Kontos (1) , Alfredo Levy Yeyati (2)

1 LPA - Laboratoire Pierre Aigrain
2 UAM - Universidad Autónoma de Madrid

We suggest a way to characterize the coherence of the split Cooper pairs emitted by a double-quantum-dot based Cooper pair splitter (CPS), by studying the radiative response of such a CPS inside a microwave cavity. The coherence of the split pairs manifests in a strongly non-monotonous variation of the emitted radiation as a function of the parameters controlling the coupling of the CPS to the cavity. The idea to probe the coherence of the electronic states using the tools of Cavity Quantum Electrodynamics could be generalized to many other nanoscale circuits.

Domaines: Autre [cond-mat.other]

Audrey Cottet, Takis Kontos, Alfredo Levy Yeyati. Subradiant split Cooper pairs. Physical Review Letters, 2012, 108, pp.166803. ⟨10.1103/PhysRevLett.108.166803⟩. ⟨hal-00646950⟩