Hydrodynamic quantization approach to Bose-Einstein condensation - art. no. 053607

In this paper we employ the hydrodynamic quantization approach to studying the macroscopic state occupation of a bosonic system. We propose that the c ondensed state is a coherent state of the phase field component associated with the quantized field operator. By making Ansatze on functional states, we transform the problem of finding the phase and density associated with t he condensate into a variational problem. We also discuss some properties o f the condensed state, like superfluidity. In close analogy with Bose-Einst ein condensation in the (p) over right arrow = 0 state, we propose some pos sible wave functions for the excited states of a condensed system.