Evidence of Bose-Einstein Condensation in an Atomic Gas with Attractive Interactions

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dc.citation.firstpage1687en_US
dc.citation.issueNumber9en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.lastpage1690en_US
dc.citation.volumeNumber75en_US
dc.contributor.authorBradley, C.C.en_US
dc.contributor.authorSackett, C.A.en_US
dc.contributor.authorTollett, J.J.en_US
dc.contributor.authorHulet, R.G.en_US
dc.contributor.orgRice Quantum Instituteen_US
dc.date.accessioned2015-03-30T19:07:12Z
dc.date.available2015-03-30T19:07:12Z
dc.date.issued1995en_US
dc.description.abstractEvidence for Bose-Einstein condensation of a gas of spin-polarized 7Li atoms is reported. Atoms confined to a permanent-magnet trap are laser cooled to 200 μK and are then evaporatively cooled to lower temperatures. Phase-space densities consistent with quantum degeneracy are measured for temperatures in the range of 100 to 400 nK. At these high phase-space densities, diffraction of a probe laser beam is observed. Modeling shows that this diffraction is a sensitive indicator of the presence of a spatially localized condensate. Although measurements of the number of condensate atoms have not been performed, the measured phase-space densities are consistent with a majority of the atoms being in the condensate, for total trap numbers as high as 2×10˄5 atoms. For 7Li, the spin-triplet s-wave scattering length is known to be negative, corresponding to an attractive interatomic interaction. Previously, Bose-Einstein condensation was predicted not to occur in such a system.en_US
dc.identifier.citationBradley, C.C., Sackett, C.A., Tollett, J.J., et al.. "Evidence of Bose-Einstein Condensation in an Atomic Gas with Attractive Interactions." <i>Physical Review Letters,</i> 75, no. 9 (1995) American Physical Society: 1687-1690. http://dx.doi.org/10.1103/PhysRevLett.75.1687.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.75.1687en_US
dc.identifier.urihttps://hdl.handle.net/1911/79442
dc.language.isoengen_US
dc.publisherAmerican Physical Society
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleEvidence of Bose-Einstein Condensation in an Atomic Gas with Attractive Interactionsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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