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Reproducible dynamic dark ring lattices for ultracold atoms

Houston, N. and Riis, E. and Arnold, A.S. (2008) Reproducible dynamic dark ring lattices for ultracold atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 41 (21). ISSN 0953-4075

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We demonstrate the generation of highly adaptable and reproducible dark optical ring lattices, which do not require Laguerre-Gauss beams or interferometric stability. In conjunction with a magnetic trap, these scanned 2D intensity distributions will enable low-decoherence trapping and straightforward dynamic manipulation of ultracold species in annular geometries using low-intensity regions of blue-detuned light. The technique is ideal for azimuthal ratchet, Mott insulator and persistent current experiments with quantum degenerate gases.