Dynamics and Berry phase of two-species Bose-Einstein condensates

A full quantum-mechanical evaluation of the dynamics of the two-species Bose-Einstein condensates was reported. Phenomenon of self-trapping, phase locking and collapse-revival were also investigated. The Berry phase which depends upon the number parity of atoms was found out. Results show that the nonlinear interatom coupling does not affect the Berry phase but leads to damping and collapse revival.published_or_final_versio