Classical dynamics of a two-species Bose-Einstein condensate in the   presence of nonlinear maser processes
  The stability analysis of a generalized Dicke model, in the semi-classical limit, describing the interaction of a two-species Bose-Einstein condensate driven by a quantized field in the presence of Kerr and spontaneous parametric processes is presented. The transitions from Rabi to Josephson dynamics are identified depending on the relative value of the involved parameters. Symmetry-breaking dynamics are shown for both types of coherent oscillations due to the quantized field and nonlinear optical processes. 
B. M. Rodr\'iguez-Lara and R.-K. Lee
quant-ph cond-mat.quant-gas