Exact Dynamical Structure Factor of a Bose Liquid

Details Exact Dynamical Structure Factor of a Bose Liquid Exact Dynamical Structure Factor of a Bose Liquid

1997-04-27

arxiv.org/abs/cond-mat/9704222v2

Physics

Condensed Matter

RevTex, 6 pages, no figures, replaced previously empty file

Scientific paper

Based on ideas introduced in a previous preprint cond-mat/9701206 we propose an exactly solvable model of bosons interacting amongst themselves via a Van-der Waal-like repulsive interaction, and compute both the filling fraction and the dynamical structure factor exactly. The novelty of this approach involves introducing, analogous to Fermi sea (or surface) displacements, Bose fields that in this case, correspond to fluctuations of the Bose condensate. The exact dynamical structure factor has a coherent part that corresponds to the Bogoliubov spectrum and an incoherent part that is a result of correlations.

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