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Quantum corrections to the semiclassical Hartree-Fock theory of a harmonically trapped Bose gas
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
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2012 (English)In: European Physical Journal D: Atomic, Molecular and Optical Physics, ISSN 1434-6060, E-ISSN 1434-6079, Vol. 66, no 8, 203- p.Article in journal (Refereed) Published
Abstract [en]

Using the phase-space expansion of the thermodynamical distribution functions we provide a general and systematic method for including effects beyond the local-density approximation to the semiclassical Hartree-Fock theories. We illustrate the method by applying it to the case of a strictly two-dimensional, harmonically trapped Bose gas. Thereby, we address the ambiguous prediction of the Hartree-Fock approximation, namely, whether a fixed number of trapped atoms undergoes Bose-Einstein condensation or not. We also investigate the dependence of the critical temperature on the interaction strength.

Place, publisher, year, edition, pages
2012. Vol. 66, no 8, 203- p.
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Atom and Molecular Physics and Optics
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URN: urn:nbn:se:su:diva-81553DOI: 10.1140/epjd/e2012-30225-yISI: 000308253500023OAI: oai:DiVA.org:su-81553DiVA: diva2:564072
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AuthorCount:7;

Available from: 2012-11-01 Created: 2012-10-25 Last updated: 2017-12-07Bibliographically approved

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Nordic Institute for Theoretical Physics (Nordita)
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European Physical Journal D: Atomic, Molecular and Optical Physics
Atom and Molecular Physics and Optics

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