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

Cherny, Alexander Y.; Shanenko, AA

doi:10.1016/S0375-9601(02)00017-8

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

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

MPS-Authors

/persons/resource/persons184415

Cherny, Alexander Y.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

External Resource

https://arxiv.org/pdf/cond-mat/0105339.pdf
(Preprint)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Cherny, A. Y., & Shanenko, A. (2002). The kinetic and interaction energies of a trapped Bose gas: beyond the mean field. Physics Letters. A, 293(5-6): PII S0375-9601(02)00017-8, pp. 287-292. doi:10.1016/S0375-9601(02)00017-8.

Cite as: https://hdl.handle.net/21.11116/0000-0010-51AA-3

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.