Production of Sodium Bose--Einstein condensates in an optical dimple trap

We report on the realization of a sodium Bose--Einstein condensate (BEC) in a combined red-detuned optical dipole trap, formed by two beams crossing in a horizontal plane and a third, tightly focused dimple trap propagating vertically. We produce a BEC in three main steps: loading of the crossed dip...

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Bibliographic Details
Published in:arXiv.org 2011-05
Main Authors: Jacob, David, Mimoun, Emmanuel, De Sarlo, Luigi, Weitz, Martin, Dalibard, J, Gerbier, F
Format: Article
Language:English
Subjects:
Beams (radiation)
Condensates
Cooling
Dimpling
Dipoles
Evaporation
Evaporative cooling
Laser cooling
Online Access:Get full text
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Summary:We report on the realization of a sodium Bose--Einstein condensate (BEC) in a combined red-detuned optical dipole trap, formed by two beams crossing in a horizontal plane and a third, tightly focused dimple trap propagating vertically. We produce a BEC in three main steps: loading of the crossed dipole trap from laser-cooled atoms, an intermediate evaporative cooling stage which results in efficient loading of the auxiliary dimple trap, and a final evaporative cooling stage in the dimple trap. Our protocol is implemented in a compact setup and allows us to reach quantum degeneracy even with relatively modest initial atom numbers and available laser power.
ISSN:2331-8422
DOI:10.48550/arxiv.1104.1009