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

Graham D. Bruce, Sarah L. Bromley, Giuseppe Smirne, Lara Torralbo-Campo, Donatella Cassettari

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    Abstract

    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 (BECs) 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 BECs than by evaporative cooling alone.
    ©2011 American Physical Society
    Original languageEnglish
    Article number053410
    Number of pages6
    JournalPhysical Review A
    Volume84
    Issue number5
    DOIs
    Publication statusPublished - 2011

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