Correlation effects on the static structure factor of a Bose gas

Details Correlation effects on the static structure factor of a Bose gas Correlation effects on the static structure factor of a Bose gas

2004-06-22

arxiv.org/abs/cond-mat/0406514v1

Phys.Lett. A328 (2004) 319-325

Physics

Condensed Matter

Other Condensed Matter

7 pages, 8 figures

Scientific paper

10.1016/j.physleta.2004.06.051

A theoretical treatment of the static structure factor $S(k)$ of a Bose gas is attempted. The low order expansion theory is implemented for the construction of the two body density distribution, while various trial functions for the radial distribution function $g(r)$ are used. $g(r)$ introduces the atomic correlations and describes the departure from the noninteracting gas. The Bose gas is studied as inhomogeneous one, trapped in harmonic oscillator well, as well as homogeneous. A suitable parametrization of the various trial functions $g(r)$ exists which leads to satisfactory reproduction of the experimental values of $S(k)$, both in inhomogeneous case as well as in homogeneous one. The phonon range behavior of the calculated $S(k)$ is also addressed and discussed both in finite and infinite Bose gas.

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