Europhys. Lett.
Volume 67, Number 6, September 2004
Page(s) 881 - 886
Section General
Published online 01 September 2004
Europhys. Lett., 67 (6), pp. 881-886 (2004)
DOI: 10.1209/epl/i2004-10147-0

Entanglement storage in atomic ensembles

A. 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