Abstract
Phase properties of the field in a coherent state interacting with a two-level atom in a lossless cavity (Jaynes-Cummings models) are studied using the new phase formalism of Pegg and Barnet. The phase density distribution, the expectation values and the variances of the hermitian phase operator are calculated. On a polar diagram, the initial phase distribution is shown to split into two counterrotating satellite distributions. When two satellite distributions overlap, revivals of the atomic inversion occur. Phase properties of the field in a model with an intensity depending coupling, for which the time behavior is exactly periodic, are also discussed.
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