Entanglement storage in atomic ensemblesA. Dantan, A. Bramati and M. Pinard
Laboratoire Kastler Brossel, Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris Cedex 05, France
(Received 5 May 2004; accepted in final form 19 July 2004)
We propose to entangle macroscopic atomic ensembles in cavity using EPR-correlated beams. We show how the field entanglement can be almost perfectly mapped onto the long-lived atomic spins associated with the ground states of the ensembles, and how it can be retrieved in the fields exiting the cavities after a variable storage time. Such a continuous variable quantum memory is of interest for manipulating entanglement in quantum networks.
03.67.-a - Quantum information.
03.67.Mn - Entanglement production, characterization and manipulation.
42.50.Lc - Quantum fluctuations, quantum noise, and quantum jumps.
© EDP Sciences 2004