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Fluctuations and squeezing in resonance fluorescence emitted near a phase conjugator.

Abstract : Atomic resonance fluorescence, emitted near the surface of a four-wave mixing phase conjugator, exhibits squeezing for certain values of the optical parameters of the incident laser field and for a certain range of the phase-conjugate reflectivity. A condition for the occurrence of squeezing is derived, and it is shown that the presence of the phase-conjugating medium tends to increase the quantum fluctuations, thereby diminishing the squeezing.