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.accessioned2015-03-30T19:07:12Zen_US
dc.date.available2015-03-30T19:07:12Zen_US
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.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.75.1687en_US
dc.identifier.urihttps://hdl.handle.net/1911/79442en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
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.en_US
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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