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Castaing’s instability in a trapped ultra-cold gas

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Abstract.

We consider a trapped ultra-cold gas of (non-condensed) bosons with two internal states (described by a pseudo spin) and study the stability of a longitudinal pseudo spin polarization gradient. For this purpose, we numerically solve a kinetic equation corresponding to a situation close to the experiment at JILA [1]. It shows the presence of Castaing’s instability of transverse spin polarization fluctuations at long wavelengths. This phenomenon could be used to create spontaneous transverse spin waves.

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Authors and Affiliations

  1. Laboratoire Kastler Brossel, Département de Physique de l’ENS, 24 rue Lhomond, 75005, Paris, France

    J. N. Fuchs, O. Prévoté & D. M. Gangardt

Authors
  1. J. N. Fuchs
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  2. O. Prévoté
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  3. D. M. Gangardt
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Corresponding author

Correspondence to J. N. Fuchs.

Additional information

Received: 1st October 2002, Published online: 15 July 2003

PACS:

03.75.Nt Other Bose-Einstein condensation phenomena - 51.10.+y Kinetic and transport theory of gases - 75.30.Ds Spin waves

O. Prévoté: Present address: Université de Cergy-Pontoise, Département de Physique, 5 mall Gay Lussac, Neuville-sur-Oise, 95031 Cergy-Pontoise, France.

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Fuchs, J.N., Prévoté, O. & Gangardt, D.M. Castaing’s instability in a trapped ultra-cold gas. Eur. Phys. J. D 25, 167–171 (2003). https://doi.org/10.1140/epjd/e2003-00204-8

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  • DOI: https://doi.org/10.1140/epjd/e2003-00204-8

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