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Many-body approach to low-lying collective excitations in a BEC approaching collapse
A BISWAS,
Published in IOP PUBLISHING LTD
2008
Volume: 41
   
Issue: 23
Abstract
An approximate many-body theory incorporating two-body correlations has been employed to calculate low-lying collective multipole frequencies in a Bose-Einstein condensate containing A bosons, for different values of the interaction parameter . Significant difference from the variational estimate of the Gross-Pitaevskii equation has been found near the collapse region. This is attributed to two-body correlations and finite range attraction of the realistic interatomic interaction. A large deviation from the hydrodynamic model is also seen for the second monopole breathing mode and the quadrupole mode for large positive λ. © 2008 IOP Publishing Ltd.
About the journal
JournalData powered by TypesetJournal of Physics B: Atomic, Molecular and Optical Physics
PublisherData powered by TypesetIOP PUBLISHING LTD
ISSN0953-4075
Open AccessYes