title: Manipulation of a two-photon pump in superconductor-semiconductor heterostructures.
abstract: 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.
authors.affiliation: Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany and Instituut-Lorentz, Universiteit Leiden, Post Office Box 9506, 2300 RA Leiden, The Netherlands.
authors.forename: Paul
authors.initials: P
authors.lastname: Baireuther
authors.affiliation: Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
authors.forename: Peter P
authors.initials: PP
authors.lastname: Orth
authors.affiliation: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
authors.forename: Ilya
authors.initials: I
authors.lastname: Vekhter
authors.affiliation: Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Schmalian