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  The kinetic and interaction energies of a trapped Bose gas: beyond the mean field

Cherny, A. Y., & Shanenko, A. A. (2002). The kinetic and interaction energies of a trapped Bose gas: beyond the mean field. Physics Letters A, 293(5-6), 287-292. Retrieved from http://www.sciencedirect.com/science?_ob=IssueURL&_tockey=%23TOC%235538%232002%23997069994%23283381%23FLA%23Volume_293,_Issues_5-6,_Pages_211-302_(4_February_2002)&_auth=y&view=c&_acct=C000002818&_version=1&_urlVersion=0&_userid=42421&md5=7f427fa0f3cc4752833594e4e048ecc9.

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 Creators:
Cherny, A. Y.1, Author              
Shanenko, A. A., Author
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Ultracold matter
 Abstract: The kinetic and interaction energies of a three-dimensional (3D) dilute ground-state Bose gas confined in a trap are calculated beyond a mean-field treatment. They are found to depend on the pairwise interaction trough two characteristic lengths: the first, a, is the well-known scattering length and the second, b, is related to the latter by b = a - lambdapartial derivativea/partial derivativelambda with lambda being the coupling constant. Numerical estimations show that the pairwise interaction energy of a dilute gas of alkali atoms in a trap is negative (in spite of the positive scattering length); its absolute value is found by about the order of magnitude larger than that of the mean-field interaction energy that corresponds to the last term in the Gross-Pitaevskii (GP) functional. (C) 2002 Published by Elsevier Science B.V.

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Language(s): eng - English
 Dates: 2002-02-01
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: Peer
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Title: Physics Letters A
  Alternative Title : Phys. Lett. A
Source Genre: Journal
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Pages: - Volume / Issue: 293 (5-6) Sequence Number: - Start / End Page: 287 - 292 Identifier: ISSN: 0375-9601