Title: Time evolution of freely expanded Bose-Einstein condensates containing small numbers of atoms
Authors: Hong, De-Sheng
Huang, K. H.
Jiang, Tsin-Fu
Han, D. J.
Institute of Physics
Issue Date: 1-Apr-2007
Abstract: We investigate the time evolution of freely expanded Bose-Einstein condensates by measuring their aspect ratios at different times after their release from a magnetic trap. In these measurements the condensates contain no more than 9000 Rb-87 atoms. By varying the trapping frequency and atom number, we measure the condensate aspect ratios at different expansion times in free space. We compare our measurements with those calculated from the Thomas-Fermi model and a direct numerical solution. Under our trapping condition, the data of the time dependent aspect ratios of the freely expanded condensates reasonably agrees with the numerical calculations, but shows a clear deviation from the predictions of the Thomas-Fermi model when the atom number in the condensates is small.
URI: http://hdl.handle.net/11536/10991
ISSN: 0577-9073
Volume: 45
Issue: 2
Begin Page: 104
End Page: 114
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