Spin-Squeezing and Light Entanglement in Coherent Population Trapping
Aurelien Dantan, Jean Cviklinski, Elisabeth Giacobino, Michel Pinard
Abstract
We show that high squeezing and entanglement can be generated at the output of a cavity containing atoms interacting with two fields in a Coherent Population Trapping situation, on account of a non-linear Faraday effect experienced by the fields close to a dark-state resonance in a cavity. Moreover, the cavity provides a feedback mechanism allowing to reduce the quantum fluctuations of the ground state spin, resulting in strong steady state spin-squeezing.
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