A model of a three-level atom in the -configuration interacting with a two-mode field under a multi-photon process is considered. The effects of the mean photon numbers, detuning, Kerr-like medium parameters and various forms of the intensity-dependent coupling functional are considered. Analytical expressions for the time unitary operator, the density operator and the final state of the system are analyzed via the framework of the dressed states. The atom is prepared in its upper excited state, and the fields are prepared in binomial states. The general conclusions reached are illustrated by numerical results displaying the effects of photon-number, detuning and nonlinearities of both the field and intensity-dependent atom-field couplings.
A model of a three-level atom V-configuration interacting with a two-mode field through the mechanism of multi-photon transition is studied. The effects of mean photon numbers, detuning, and the Kerr-like medium parameters are investigated within various forms of the intensity-dependent coupling functional. Analytical expressions for the time evolution and the reduced atomic density operators of the system are obtained in the context of the framework of the dressed states. The atom is prepared in its uppermost excited state and the fields are prepared in binomial states. General conclusions reached are illustrated by numerical results.
General formalisms of a four-level atom in different configurations interacting with a single mode quantized electromagnetic field under multi-photon process with additional forms of nonlinearities of both the field and the intensity-dependent atom-field coupling are investigated. Analytical expressions for the time unitary evolution operator and density operator are obtained. The atom is prepared in its upper most and the field is prepared in a binomial state. The effects of the mean photon number, photon multiplicity, detuning, Kerr-like medium and the intensity-dependent coupling functional on the entropy are considered. General conclusions reached are illustrated by numerical results.
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