Phase properties of a field mode interacting with a three-level atom with Kerr nonlinearity

Phase properties of a field interacting with a three-level atom with a Kerr -like medium are investigated through the phase formalism of Pegg and Barne tt. The phase probability distribution, the expectation value and the phase fluctuations of the Hermitian phase operator are calculated. The phase pro perties of the held reflect the collapses and revivals. A number of interes ting features are found and discussed.