%0 Journal Article
%T Comment on: rotational properties of trapped bosons
%A F. Brosens
%A J. T. Devreese
%A L. F. Lemmens
%J Physics
%D 2000
%I arXiv
%R 10.1103/PhysRevA.55.2453
%X Based on the Hellman-Feynman theorem it is shown that the average square radius of a cloud of interacting bosons in a parabolic well can be derived from their free energy. As an application, the temperature dependence of the moment of inertia of non-interacting bosons in a parabolic trap is determined as a function of the number of bosons. Well below the critical condensation temperature, the Bose-Einstein statistics are found to substantially reduce the moment of inertia of this system, as compared to a gas of ``distinguishable'' particles in a parabolic well.
%U http://arxiv.org/abs/cond-mat/0004208v1