SQUEEZING IN 2-ATOM RESONANCE FLUORESCENCE INDUCED BY 2-PHOTON COHERENCES

We examine squeezing properties of resonance fluorescence from two int eracting atoms. Previous theoretical analyses of this model have predi cted squeezing on one-photon resonance. Here we show that it is possib le to obtain squeezing in two-atom resonance fluorescence through two- photon transitions induced by a cooperative atomic interaction. The sq ueezing occurs near a two-photon resonance and is not sensitive to the duration of the detection time in comparison with the decay time of t he subradiant state. Moreover, squeezing near a two-photon resonance i s completely independent of the direction of observation in respect to the atomic axis and can be significantly larger than that previously found on one-photon resonance.