Strong dipolar effects in a quantum ferrofluid

Thierry Lahaye (), Tobias Koch, Bernd Fröhlich, Marco Fattori, Jonas Metz, Axel Griesmaier, Stefano Giovanazzi and Tilman Pfau ()
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Thierry Lahaye: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Tobias Koch: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Bernd Fröhlich: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Marco Fattori: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Jonas Metz: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Axel Griesmaier: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Stefano Giovanazzi: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
Tilman Pfau: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany

Nature, 2007, vol. 448, issue 7154, 672-675

Abstract: Quantum ferrofluids A paper in this issue addresses a hot topic in the physics of ultracold atoms — quantum ferrofluids, which are superfluid quantum gases that consist of polarized dipoles, either electric or magnetic. The symmetry-breaking interaction between such dipoles is expected to lead to new physical phenomena. Now a group from Stuttgart University has succeeded in producing a chromium Bose–Einstein condensate with strong anisotropic magnetic dipole–dipole interaction between the atoms, which induces a pronounced change of the aspect ratio of the cloud. This much-sought form of matter should enable fundamental studies of physical systems in previously unexplored regimes.

Date: 2007
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DOI: 10.1038/nature06036

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