On the Momentum Distribution and Condensate Fraction in the Bose Liquid

A. Yu. Cherny, A. A. Shanenko

Published 1997-10-31Version 1

The model recently proposed by A.A. Shanenko [Phys. Lett. A 227 (1997) 367] is used to derive linear integro-differential equations whose solutions provide reasonable estimates for the momentum distribution and condensate fraction in interacting many-boson system at zero temperature. An advantage of these equations is that they can be employed in the weak coupling regime and beyond. As an example, analytical treatment of the weak coupling case is given.