Fast production of large 23Na Bose-Einstein condensates in an optically plugged magnetic quadrupole trap

Details Fast production of large 23Na Bose-Einstein condensates in an optically plugged magnetic quadrupole trap Fast production of large 23Na Bose-Einstein condensates in an optically plugged magnetic quadrupole trap

2010-11-04

arxiv.org/abs/1011.1078v1

Physical Review A 83, 013622 (2011)

Physics

Condensed Matter

Quantum Gases

6 pages, 6 figures

Scientific paper

10.1103/PhysRevA.83.013622

We demonstrate a fast production of large 23Na Bose-Einstein condensates in an optically plugged, magnetic quadrupole trap. A single global minimum of the trapping potential is generated by slightly displacing the plug beam from the center of the quadrupole field. With a dark magneto-optical trap and a simple rf evaporation, our system produces a condensate with N = 10^7 atoms every 17 s. The Majorana loss rates and the resultant heating rates for various temperatures are measured with and without plugging. The average energy of a spin-flipped atom is almost linearly proportional to temperature and determined to be about 60% of the average energy of a trapped atom. We present a numerical study of the evaporation dynamics in a plugged linear trap.

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