5 research outputs found
Gapless Hartree-Fock-Bogoliubov Approximation for Bose Gases
A dilute Bose system with Bose-Einstein condensate is considered. It is shown
that the Hartree-Fock-Bogolubov approximation can be made both conserving as
well as gapless. This is achieved by taking into account all physical
normalization conditions, that is, the normalization condition for the
condensed particles and that for the total number of particles. Two Lagrange
multipliers, introduced for preserving these normalization conditions, make the
consideration completely self-consistent.Comment: Latex file, 22 pages, 2 figure
The role of nucleon structure in finite nuclei
The quark-meson coupling model, based on a mean field description of
non-overlapping nucleon bags bound by the self-consistent exchange of ,
and mesons, is extended to investigate the properties of finite
nuclei. Using the Born-Oppenheimer approximation to describe the interacting
quark-meson system, we derive the effective equation of motion for the nucleon,
as well as the self-consistent equations for the meson mean fields. The model
is first applied to nuclear matter, after which we show some initial results
for finite nuclei.Comment: The revised version. This is tar, compressed and uuencoded (including
3 tables and 8 figures). 45 page