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Coherence and entanglement created by a finite-size atomic ensemble in a ring cavity

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Abstract

We report several new interesting aspects of coherence and entanglement behaviour that emerge in the interaction of a finite-size atomic ensemble with degenerate counter-propagating field modes of a high-Q ring cavity when the size of the atomic ensemble is not taken to the thermodynamic limit of N → ∞. It is found that the counter-propagating cavity modes, although in the thermodynamic limit are mutually incoherent and exhibit no correlations, the modes can, however, be made mutually correlated and exhibit interference, super-bunching effect, and produce squeezing and entanglement.

© 2012 Optical Society of America

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