Nonlinear coherent state generation in the two-photon Jaynes-Cummings   model
  We show that the two-photon Jaynes-Cummings model, feasible of experimental realization in cavity or ion-trap quantum electrodynamics, can approximately produce nonlinear coherent states of the field. We introduce these nonlinear coherent states of the field as $2m$-photon added or subtracted coherent states in terms of raising and lowering field operators, also known as London phase operators or Susskind-Glogower operators. 
I. Ramos Prieto, B. M. Rodr\'iguez-Lara, and H. M. Moya-Cessa
quant-ph