Abstract
For the process of three-photon absorption in the case of a cubic parametric perturbation a possibility to obtain quantum superposition states of three coherent components is shown. The one-photon and two-photon absorption processes are shown to destroy the interference between the state components: the quantum superposition state decays into the classical mixture of its components. It is shown that the interference between different three-component coherent superposition states formed in the system can, depending on the initial state of the field, result in almost full localization of the optical system in a two-component state, or in destruction of the interference between different coherent components. The Wigner functions and quantum entropy of the system are calculated for a variety of initial states.
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