Atomic quantum memory: cavity vs single pass schemes

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

1 LKB (Jussieu) - Laboratoire Kastler Brossel

This paper presents a quantum mechanical treatment for both atomic and field fluctuations of an atomic ensemble interacting with propagating fields, either in Electromagnetically Induced Transparency or in a Raman situation. The atomic spin noise spectra and the outgoing field spectra are calculated in both situations. For suitable parameters both EIT and Raman schemes efficiently preserve the quantum state of the incident probe field in the transfer process with the atoms, although a single pass scheme is shown to be intrinsically less efficient than a cavity scheme.

Domaines: Physique Quantique [quant-ph]

Aurelien Dantan, Alberto Bramati, Michel Pinard. Atomic quantum memory: cavity vs single pass schemes. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2005, 71, pp.043801. ⟨hal-00003085⟩