New J. Phys. 10 (March 2008) 033025 (27pp) doi: 10.1088/1367-2630/10/3/033025
Time-separated entangled light pulses from a single-atom emitter
David Vitali1, Priscilla Cañizares1, Jürgen Eschner2 and Giovanna Morigi3
1 Dipartimento di Fisica, Università di Camerino, 62032 Camerino, Italy
2 ICFO—Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
3 Departament de Fisica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
E-mail: Giovanna.Morigi@uab.esAbstract.
The controlled interaction between a single, trapped, laser-driven atom and the mode of a high-finesse optical cavity allows for the generation of temporally separated, entangled light pulses. Entanglement between the photon-number fluctuations of the pulses is created and mediated via the atomic center-of-mass motion, which is interfaced with light through the mechanical effect of atom–photon interaction. By means of a quantum noise analysis we determine the correlation matrix which characterizes the entanglement as a function of the system parameters. The scheme is feasible in experimentally accessible parameter regimes. It may be easily extended to the generation of entangled pulses at different frequencies, even at vastly different wavelengths.
Received 20 December 2007
Published 17 March 2008
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