DRESSED STATES AND RESONANCE FLUORESCENCE OF A 2-LEVEL ATOM IN A SQUEEZED VACUUM

The dressed state populations and resonance fluorescence spectra of a two level atom interacting with a detuned classical field in the prese nce of a squeezed vacuum are investigated. The classical field need no t be resonant with the atomic transition and the squeezing need not be perfect. It is found that the asymmetry of the resonance fluorescence spectra may be reversed on applying a very small change in the detuni ng. We point out that, in general, the spectra are extremely sensitive to the degree of perfection of the squeezing. A slight degree of impe rfection may cause many of the interesting features to disappear.