Model boson fluid with disorder in the self-consistent field approximation

Date
2001
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Source Title
Physics Letters, Section A: General, Atomic and Solid State Physics
Print ISSN
0375-9601
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Volume
286
Issue
5
Pages
362 - 368
Language
English
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Abstract

We study the ground-state properties of a model neutral boson fluid in the presence of disorder effects. The effective interaction between the bosons is obtained through the self-consistent field method which renormalizes the bare interaction consisting of a hard-core repulsive potential with an attractive tail at zero temperature. We introduce disorder effects within a number-conserving approximation by modifying the density - density response function. Our results for the static structure factor and the collective mode dispersion reflect the effect of disorder in qualitative agreement with other calculational approaches. © 2001 Elsevier Science B.V. All reserved.

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