Entanglement storage in atomic ensembles

Aurelien Dantan (1) , Alberto Bramati (1) , Michel Pinard (1)

1 LKB (Jussieu) - Laboratoire Kastler Brossel

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.

Domaines: Physique Quantique [quant-ph]

Aurelien Dantan, Alberto Bramati, Michel Pinard. Entanglement storage in atomic ensembles. EPL - Europhysics Letters, 2004, 67, pp.881. ⟨hal-00001522⟩