Single-passage read-out of atomic quantum memory

Details Single-passage read-out of atomic quantum memory Single-passage read-out of atomic quantum memory

2005-10-13

arxiv.org/abs/quant-ph/0510099v1

Phys. Rev. A 73, 022331 (2006).

Physics

Quantum Physics

8 pages, 2 figures, RevTeX4

Scientific paper

10.1103/PhysRevA.73.022331

A scheme for retrieving quantum information stored in collective atomic spin systems onto optical pulses is presented. Two off-resonant light pulses cross the atomic medium in two orthogonal directions and are interferometrically recombined in such a way that one of the outputs carries most of the information stored in the medium. In contrast to previous schemes our approach requires neither multiple passes through the medium nor feedback on the light after passing the sample which makes the scheme very efficient. The price for that is some added noise which is however small enough for the method to beat the classical limits.

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