Geometric quantum phase for displaced states for a particle with an   induced electric dipole moment
  Basing on the analogue Landau levels for a neutral particle possessing an induced electric dipole moment, we show that displaced states can be built in the presence of electric and magnetic fields. Besides, the Berry phase associated with these displaced quantum states is obtained by performing an adiabatic cyclic evolution in series of paths in parameter space. 
J. Lemos de Melo, K. Bakke and C. Furtado
quant-ph