ANALYTICAL RESULTS FOR THE PROBE ABSORPTION-SPECTRUM OF A DRIVEN 2-LEVEL ATOM IN A SQUEEZED VACUUM WITH FINITE BANDWIDTH

Analytical formulas for the probe absorption spectrum of a driven two- level atom damped to a squeezed vacuum with finite bandwidth are deriv ed. We use the master equation approach to describe the evolution of t he strongly driven two-level atom coupled to the reservoir being a squ eezed vacuum with finite bandwidth produced by a degenerate parametric oscillator (DPO). The master equation iis derived under the Born and Markov approximation which require the squeezed vacuum bandwidth to be much larger than the atomic linewidth, but not necessarily larger tha n the Rabi frequency of the driving field. Our master equation takes i nto account the detuning of the laser field from the atomic resonance. Examples of the absorption spectra are plotted and compared to their equivalents for the broadband squeezing.