Temporal Dynamics of Photon Pairs Generated by an Atomic Ensemble

Details Temporal Dynamics of Photon Pairs Generated by an Atomic Ensemble Temporal Dynamics of Photon Pairs Generated by an Atomic Ensemble

2004-06-08

arxiv.org/abs/quant-ph/0406050v1

Physics

Quantum Physics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.93.263601

The time dependence of nonclassical correlations is investigated for two fields (1,2) generated by an ensemble of cold Cesium atoms via the protocol of Duan et al. [Nature Vol. 414, p. 413 (2001)]. The correlation function R(t1,t2) for the ratio of cross to auto-correlations for the (1,2) fields at times (t1,t2) is found to have a maximum value Rmax=292(+-)57, which significantly violates the Cauchy-Schwarz inequality R<=1 for classical fields. Decoherence of quantum correlations is observed over 175 ns, and is described by our model, as is a new scheme to mitigate this effect.

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