A purely dipolar quantum gas

We report on experiments exploring the physics of dipolar quantum gases using a Chromium Bose-Einstein condensate (BEC). By means of a Feshbach resonance, it is possible to reduce the effects of short range interactions and reach a regime where the physics is governed by the long-range, anisotropic...

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Bibliographic Details
Published in:arXiv.org 2008-08
Main Authors: Lahaye, T, Metz, J, Koch, T, Fröhlich, B, Griesmaier, A, Pfau, T
Format: Article
Language:English
Subjects:
Chromium
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Condensates
Dipole interactions
Ellipticity
Magnetic moments
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Summary:We report on experiments exploring the physics of dipolar quantum gases using a Chromium Bose-Einstein condensate (BEC). By means of a Feshbach resonance, it is possible to reduce the effects of short range interactions and reach a regime where the physics is governed by the long-range, anisotropic dipole-dipole interaction between the large (\(6 \mu_{\rm B}\)) magnetic moments of Chromium atoms. Several dramatic effects of the dipolar interaction are observed: the usual inversion of ellipticity of the condensate during time-of flight is inhibited, the stability of the dipolar gas depends strongly on the trap geometry, and the explosion following the collapse of an unstable dipolar condensate displays d-wave like features.
ISSN:2331-8422
DOI:10.48550/arxiv.0808.3876