The ground-state energy of the quasi-one-dimensional charged Bose condensate

In a recent paper we studied the ground-state energy of a quasi-one dimensi onal charged Bose condensate confined by a two-dimensional oscillator poten tial [1]. Many-body effects beyond the RPA have been taken into account by the local-field correction. In the present paper we study a quasi-one dimen sional charged Bose condensate with a cylindrical confinement model (hard w alls) and compare with the results of an electron gas. The following quanti ties are calculated: interaction energy, pair-correlation function, local-f ield correction, dielectric function, collective modes.