Abstract : A combined gravitomagnetic trap was used to measure how the anharmonicity of a trapping potential affects the dynamics of a cold atomic cloud. A displacement of the effective potential minimum as a function of the ensemble temperature was observed. The effect is a direct consequence of the thermal nature of the atomic sample. The results of both a theory approach to the dynamical evolution of the atomic cloud and a numerical simulation are in very good agreement with the experimental observations. The effect can be exploited to devise a novel measurement technique for the temperature of a trapped atomic cloud, as well as to separate thermal and condensed phases in Bose-Einstein condensation experiments.
https://hal-iogs.archives-ouvertes.fr/hal-00628524
Contributeur : Andrea Bertoldi
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Soumis le : vendredi 4 décembre 2015 - 09:50:55
Dernière modification le : jeudi 11 janvier 2018 - 06:26:07
Document(s) archivé(s) le : samedi 29 avril 2017 - 04:23:02
Andrea Bertoldi, L. Ricci. Dynamics of a cold atom cloud in an anharmonic trap. Physical Review A, American Physical Society, 2010, 81, pp.063415. 〈10.1103/PhysRevA.81.063415〉. 〈hal-00628524〉
