Generalized Jaynes-Cummings Model with Intensity-Dependent and   Non-resonant Coupling
  We study the intensity-dependent and nonresonant Jaynes-Cummings Hamiltonian when the field is described by an arbitrary shape-invariant system. We determine the eigenstates, eigenvalues, time evolution matrix and the population inversion matrix factor. 
A. N. F. Aleixo (Wisconsin U., Madison & Rio de Janeiro Federal U.),   A. B. Balantekin (Max-Planck-Institute, Heidelberg & ...