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Adaptive inelastic magnetic mirror for Bose-Einstein condensates

Arnold, A.S. and MacCormick, C. and Boshier, M.G. (2002) Adaptive inelastic magnetic mirror for Bose-Einstein condensates. Physical Review A, 65 (3). 031601(R). ISSN 1094-1622

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We report the reflection and focusing of a Bose-Einstein condensate by a pulsed magnetic mirror. The mirror is adaptive, inelastic, and has extremely high optical quality. Deviations from specularity are below 1 mrad rms - almost an order of magnitude better than other atomic mirrors. The mirror has been used to realize the atom-optical analog of a beam expander, producing an ultracold collimated fountain of matter waves. The results of these experiments are in good agreement with simple theoretical models.