Manipulation of a two-photon pump in superconductor-semiconductor heterostructures

We investigate the photon statistics, entanglement, and squeezing of a p-n junction sandwiched between two superconducting leads and show that such an electrically driven photon pump generates correlated and entangled pairs of photons. In particular, we demonstrate that the squeezing of the fluctuat...

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Bibliographic Details
Published in:Physical review letters 2014-02, Vol.112 (7), p.077003-077003, Article 077003
Main Authors: Baireuther, Paul, Orth, Peter P, Vekhter, Ilya, Schmalian, Jörg
Format: Article
Language:English
Subjects:
Coherence
Compressing
Fluctuation
Order parameters
Photons
Pumps
Statistics
Superconductivity
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Summary:We investigate the photon statistics, entanglement, and squeezing of a p-n junction sandwiched between two superconducting leads and show that such an electrically driven photon pump generates correlated and entangled pairs of photons. In particular, we demonstrate that the squeezing of the fluctuations in the quadrature amplitudes of the emitted light can be manipulated by changing the relative phase of the order parameters of the superconductors. This reveals how macroscopic coherence of the superconducting state can be used to tailor the properties of a two-photon state.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.112.077003