Matter wave interferometry in a double well on an atom chip

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Abstract
We present a coherent beam splitter on an atom chip. A one-dimensional Bose-Einstein condensate trapped in a tight magnetic trap can be split into two by means of an adiabatic radio frequency induced potential. By interfering the condensates we show that the splitting process preserves the relative phase between the two BECs even when they are split far enough to inhibit tunnel coupling.

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