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The splitting of matter-waves into a superposition of spatially separatedstates is a fundamental tool for studying the basic tenets of quantum mechanicsand other theories, as well as a building block for numerous technologicalapplications. We report the realization of a matter-wave beam splitter based onmagnetic field gradients on an atom chip, which can be used for freelypropagating or trapped atoms in a Bose-Einstein condensate or a thermal state.It has a wide dynamic range of momentum transfer and operation time.Differential velocities exceeding 0.5 m/s can be achieved in a fewmicro-seconds. The beam splitter may enable a wide range of applications, suchas, fundamental studies of many-body entanglement and dephasing processes,probing classical and quantum properties of nearby solids, and metrology ofrotation, acceleration and gravity on a chip scale.

High momentum splitting of matter-waves by an atom chip field gradient beam-splitter