Use of a Coherent-State Representation for a Many-Boson System at High Density
Masahiko Tsujii, Toshiyuki Nishiyama
The ground-state energy of a many-boson system is obtained by the aid of a coherent-state representation in the high densigy limit. Dealing with the problem in a lattice space, some difficulties encountered in previous collective variable theories have been overcome. In particular, it is shown that Fröhlich's objection about the non-existence of the canonical conjugate to the density is not fatal to the previous theory of the density and phase operator approach. The ground-state energy obtained have agrees with that given by Brueckner and Lee.
Progress of Theoretical Physics•Jan 1, 1977•0 citations