Finite-Temperature Collective Excitation of a Bose-Einstein Condensate

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dc.creatorOlshanii, Maxim
dc.date1998-07-30
dc.date1998-07-31
dc.date.accessioned2026-07-07T03:11:11Z
dc.date.available2026-07-07T03:11:11Z
dc.descriptionWe derive a simple formula for the finite-temperature shifts of the collective excitations of a Bose-Einstein condensate. To test the validity of our treatment we apply it to explain the anomalous behavior of the ``m=2'' excitation frequency in the recent JILA experiments (D. S. Jin et al, PRL, 78 (1997) 764), where this frequency does not approach its ``noninteracting'' value at $ω= 2 ω_ρ$ but, instead, decreases with temperature. It turns out that the effect is mainly governed by a resonance between the condensate excitation frequency and one of the quantum eigenfrequencies of the thermal cloud. Comparison of our predictions with the JILA experimental data shows a good agreement.
dc.description4 pages, 1 figure, RevTex & PostScript
dc.identifierhttps://arxiv.org/abs/cond-mat/9807412
dc.identifierhttp://arxiv.org/abs/cond-mat/9807412
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28481
dc.subjectCondensed Matter
dc.subjectAtomic Physics
dc.subjectFluid Dynamics
dc.subjectQuantum Physics
dc.titleFinite-Temperature Collective Excitation of a Bose-Einstein Condensate
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