Atomic Transition Transfer in Cascade Three-level Jaynes-Cummings Model with Additional Kerr Medium

Under the assumption that the input field is in a coherent state and the atom is prepared in the most excited state,the time evolution of atomic populations of a cascade atom embedded in a Kerr medium is investigated by using the full quantum mechanical scheme.It is found that,with a large single-photon detuning,an atomic transition transfer can be realized by changing the intensity of the input field.An explanation to the phenomena is proposed.