Interaction Of Two-level Atoms With A Squeezed Vacuum

The squeezing and the statistical properties as well as the spectrum of thernradiation resulting from the interaction of two-level atoms with a sqneezed vacuumrnis analyzed. We have considered the case in which the two-level atoms,rnall initially in the upper level, are placed in a squeezed vacuum. We have alsornconsidered the case in which the atoms, initially with nearly equal number inrneach level, are confined in a cavity coupled to a squeezed vacuum. The quadraturernfluctuations, the photon number distribution and the spectrum of the thernradiation are calculated using the Q-function formalism. The Q-function isrndetermined applying the method of evaluating the propagator developed byrnFesseha [19,20]. The radiation is found out to be in a squeezed state for certainrnperiod of time in the first case and for all times in the second case. It is alsornshown that one effect of the squeezed vacuum is to increase the height of thernspectrum of the radiation

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