Pseudo invariant eigenoperator and energy gap for nonlinear Jaynes-Cummings model

摘要

Using the pseudo invariant eigenoperator (PIEO) method, we the oretically study a nonlinear multiphoton Jaynes-Cummings (JC) model, which in cludes any forms of the nonlinearities of both the field and the atom-field coupling. Our main task is to search for the so-called pseudo invariant eigenoperator in terms of the supersymmetric generators and derive the energy-level gap of the above system. This approach seems concise and revealing.