Strong dipolar effects in a quantum ferrofluid

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dc.creatorLahaye, Thierry
dc.creatorKoch, Tobias
dc.creatorFroehlich, Bernd
dc.creatorFattori, Marco
dc.creatorMetz, Jonas
dc.creatorGriesmaier, Axel
dc.creatorGiovanazzi, Stefano
dc.creatorPfau, Tilman
dc.date2007-06-12
dc.date2008-03-07
dc.date.accessioned2026-07-07T09:25:03Z
dc.date.available2026-07-07T09:25:03Z
dc.descriptionWe report on the realization of a Chromium Bose-Einstein condensate (BEC) with strong dipolar interaction. By using a Feshbach resonance, we reduce the usual isotropic contact interaction, such that the anisotropic magnetic dipole-dipole interaction between 52Cr atoms becomes comparable in strength. This induces a change of the aspect ratio of the cloud, and, for strong dipolar interaction, the inversion of ellipticity during expansion - the usual "smoking gun" evidence for BEC - can even be suppressed. These effects are accounted for by taking into account the dipolar interaction in the superfluid hydrodynamic equations governing the dynamics of the gas, in the same way as classical ferrofluids can be described by including dipolar terms in the classical hydrodynamic equations. Our results are a first step in the exploration of the unique properties of quantum ferrofluids.
dc.descriptionFinal, published version
dc.identifierhttps://arxiv.org/abs/0706.1670
dc.identifierhttp://arxiv.org/abs/0706.1670
dc.identifierNature 448, 672 (2007)
dc.identifierdoi:10.1038/nature06036
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156280
dc.subjectOther Condensed Matter
dc.titleStrong dipolar effects in a quantum ferrofluid
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