Quantum correlations of two optical fields close to electromagnetically induced transparency

Details Quantum correlations of two optical fields close to electromagnetically induced transparency Quantum correlations of two optical fields close to electromagnetically induced transparency

2006-03-02

arxiv.org/abs/quant-ph/0603016v3

Physical review letters 97 (19/12/2006) 253601

Physics

Quantum Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.97.253601

We show that three-level atoms excited by two cavity modes in a $\Lambda$ configuration close to electromagnetically induced transparency can produce strongly squeezed bright beams or correlated beams which can be used for quantum non demolition measurements. The input intensity is the experimental "knob" for tuning the system into a squeezer or a quantum non demolition device. The quantum correlations become ideal at a critical point characterized by the appearance of a switching behavior in the mean fields intensities. Our predictions, based on a realistic fully quantum 3-level model including cavity losses and spontaneous emission, allow direct comparison with future experiments.

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