Engineering atomic quantum reservoirs for photons

Susanne Pielawa, Luiz Davidovich, David Vitali, Giovanna Morigi

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    19 Citations (Scopus)

    Abstract

    We present protocols for creating entangled states of two modes of the electromagnetic field by using a beam of atoms crossing microwave resonators. The atoms are driven by a transverse, classical field and pump correlated photons into (i) two modes of a cavity and (ii) the modes of two distant cavities. The protocols are based on a stochastic dynamics, characterized by random arrival times of the atoms and by random interaction times between atoms and cavity modes. The resulting effective model yields a master equation, whose steady state is an entangled state of the cavity modes. In this respect, the atoms act like a quantum reservoir, pulling the cavity modes into an entangled, Einstein-Podolski-Rosen state, whose degree of entanglement is controlled by the intensity and the frequency of the transverse field. This scheme is robust against stochastic fluctuations in the atomic beam, and it does not require atomic detection nor velocity selection. © 2010 The American Physical Society.
    Original languageEnglish
    Article number043802
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume81
    Issue number4
    DOIs
    Publication statusPublished - 2 Apr 2010

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