Holographic power-law traps for the efficient production of Bose-Einstein condensates

Details Holographic power-law traps for the efficient production of Bose-Einstein condensates Holographic power-law traps for the efficient production of Bose-Einstein condensates

2011-09-07

arxiv.org/abs/1109.1502v3

Physics

Condensed Matter

Quantum Gases

6 pages, 6 figures, minor changes to figures, sentence added at the end of section IV

Scientific paper

We use a phase-only spatial light modulator to generate light distributions in which the intensity decays as a power law from a central maximum, with order ranging from 2 (parabolic) to 0.5. We suggest that a sequence of these can be used as a time-dependent optical dipole trap for all-optical production of Bose-Einstein condensates in two stages: efficient evaporative cooling in a trap with adjustable strength and depth, followed by an adiabatic transformation of the trap order to cross the BEC transition in a reversible way. Realistic experimental parameters are used to verify the capability of this approach in producing larger Bose-Einstein condensates than by evaporative cooling alone.

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