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Doklady Physics

Condensation and decondensation of the spectrum of a bichromatic field in a cavity filled with a two-level medium

А. В. Алексеев, V. I. Il'Ichev, N. V. Sushilov, E. D. Kholodkevich

Published Oct 1, 1993• 0 citations
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Physical Review A•Nov 1, 1992•21 citations
A full quantum theory is applied to the investigation of the cavity field spectrum of a system containing the cascade three-level atom,initially in the most excited state,interacting with the single mode of a Kerr-medium filled cavity.The vacuum Rabi splitting of the system is found affected by Kerr nonlinearity,contrary to the two-level atom case.For an initial Fock-state field,the Kerr effects are mainly reflected by the asymmetry of the spectrum and a change in the number of spectral peaks if the coupling between the field and the Kerr medium is weak.The effects are also reflected by receding away from the resonant frequency of the central resonant peak in the absence of the Kerr medium if the field-medium coupling is strong.For an initial thermal field,the cavity spectrum can be a continuous band or discrete lines depending on the strength of the Kerr effect.
A generalized Jaynes-Cummings model when an ideal cavity is filled with a Kerr-like medium is considered. The fluorescence spectrum produced by such a system using the infinity of transitions among the dressed states of the Jaynes-Cummings model is analyzed. A large number of resonances in the spectra are observed that are sensitive to the initial field statistics as well as the nonlinearity of the medium. Also, the fine structure of the spectra gets considerably modified by increasing the nonlinearity of the Kerr-like medium.