Geometric Phases for Coherent States
  We explore geometric phases of coherent states and some of their properties. A better and elegant expression of geometric phase for coherent state is derived. It is used to obtain the explicit form of the geometric phase for entangled coherent states, several interesting results followed by considering different cases for the parameters. The effects of entanglement and harmonic potential on the geometric phase are discussed. 
Da-Bao Yang, Jing-Ling Chen, Chunfeng Wu, and C. H. Oh
quant-ph