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Theses

Rotations d'un condensat de Bose-Einstein

Abstract : This thesis
manuscript presents experimental results on rotating Bose-Einstein
condensates. Due to the condensate's coherence, rotation generally
involves phase singularities called vortices. The isolation and
observation of a single vortex line have enabled the study of its
dynamics in an elongated condensate. The equilibrium shape of the
vortex line as well as its evolution on long time scales were
characterized. The vibrations of the line were shown to influence
the damping of surface modes. The fast rotation limit was also
studied. For intermediate rotation speeds, it is characterized by
a large number of vortices arranged in a so-called Abrikosov
lattice. For higher rotation speeds, different phases are expected
depending on the shape of the trapping potential. This limit was
studied in the case of an hybrid potential containing a small
quartic term. We have identified the rotating clouds by various
methods, revealing original properties. The observation of such
clouds is the first step to a possible future observation of
strongly correlated states close to the fractional quantum Hall
regime.
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https://tel.archives-ouvertes.fr/tel-00005961
Contributor : Vincent Bretin <>
Submitted on : Monday, April 26, 2004 - 11:53:39 AM
Last modification on : Thursday, December 10, 2020 - 12:37:15 PM
Long-term archiving on: : Wednesday, September 12, 2012 - 3:40:26 PM

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  • HAL Id : tel-00005961, version 1

Citation

Vincent Bretin. Rotations d'un condensat de Bose-Einstein. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2004. Français. ⟨tel-00005961⟩

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