Dynamics and thermodynamics in spinor quantum gases

Details Dynamics and thermodynamics in spinor quantum gases Dynamics and thermodynamics in spinor quantum gases

2004-06-21

arxiv.org/abs/cond-mat/0406485v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, 7 figures

Scientific paper

10.1007/s00340-004-1664-6

We discuss magnetism in spinor quantum gases theoretically and experimentally with emphasis on temporal dynamics of the spinor order parameter in the presence of an external magnetic field. In a simple coupled Gross-Pitaevskii picture we observe a dramatic suppression of spin dynamics due to quadratic Zeeman ''dephasing''. In view of an inhomogeneous density profile of the trapped condensate we present evidence of spatial variations of spin dynamics. In addition we study spinor quantum gases as a model system for thermodynamics of Bose-Einstein condensation. As a particular example we present measurements on condensate magnetisation due to the interaction with a thermal bath.

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