Temporal dynamics of photon pairs generated by an atomic ensemble

被引：36

作者：

Polyakov, SV ^{[1
]}

Chou, CW ^{[1
]}

Felinto, D ^{[1
]}

Kimble, HJ ^{[1
]}

机构：

[1] CALTECH, Norman Bridge Lab Phys 12 33, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 26期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.263601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 (London) 414, 413 (2001)]. The correlation function R(t(1),t(2)) for the ratio of cross to autocorrelations for the (1,2) fields at times (t(1),t(2)) is found to have a maximum value R-max=292+/-57, which significantly violates the Cauchy-Schwarz inequality Rless than or equal to1 for classical fields. Decoherence of quantum correlations is observed over tau(d)similar or equal to175 ns, and is described by our model, as is a new scheme to mitigate this effect.

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