A modulated mirror for atomic interferometry

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Abstract
A novel atomic beam splitter, using reflection of atoms off an evanescent light wave, is investigated theoretically. The intensity or frequency of the light is modulated in order to create sidebands on the reflected de Broglie wave. The weights and phases of the various sidebands are calculated using three different approaches: the Born approximation, a semiclassical path integral approach, and a numerical solution of the time-dependent Schr\"odinger equation. We show how this modulated mirror could be used to build practical atomic interferometers.
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