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Spatial interference from well-separated split condensates

Zawadzki, Mateusz Ernest and Griffin, P.F. and Riis, Erling and Arnold, A.S. (2010) Spatial interference from well-separated split condensates. Physical Review A, 81 (4). ISSN 1094-1622

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We use magnetic levitation and a variable-separation dual optical plug to obtain clear spatial interference between two condensates axially separated by up to 0.25 mm-the largest separation observed with this kind of interferometer. Clear planar fringes are observed using standard (i.e., nontomographic) resonant absorption imaging. The effect of a weak inverted parabola potential on fringe separation is observed and agrees well with theory.