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

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

2011-04-06

arxiv.org/abs/1104.1009v2

Physics

Atomic Physics

Scientific paper

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.

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