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arXiv · 1811.01448

Grey-molasses optical-tweezer loading: Controlling collisions for scaling atom-array assembly

M. O. Brown·T. Thiele·C. Kiehl·T. -W. Hsu·C. A. Regal
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Abstract

We show that with a purely blue-detuned cooling mechanism we can densely load single neutral atoms into large arrays of shallow optical tweezers. With this ability, more efficient assembly of larger ordered arrays will be possible - hence expanding the number of particles available for bottom-up quantum simulation and computation with atoms. Using Lambda-enhanced grey molasses on the D1 line of 87Rb, we achieve loading into a single 0.63 mK trap with 89% probability, and we further extend this loading to 100 atoms at 80% probability. The loading behavior agrees with a model of consecutive light-assisted collisions in repulsive molecular states. With simple rearrangement that only moves rows and columns of a 2D array, we demonstrate one example of the power of enhanced loading in large arrays.

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M. O. Brown, T. Thiele, C. Kiehl, T. -W. Hsu, C. A. Regal. 2018-11-04. Grey-molasses optical-tweezer loading: Controlling collisions for scaling atom-array assembly. https://doi.org/10.1103/physrevx.9.011057

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