Angular correlation measurements in a thermal beam of H* (2s) atoms using a Stern-Gerlach atomic axicon

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Abstract
The effect of transverse magnetic gradients in Stern-Gerlach atom interferometry is to make interfere plane waves the momenta of which differ in their directions. As a result the contrast of the interference pattern produced by the longitudinal gradient is attenuated by an angular auto-correlation function in the momentum space. This effect is studied experimentally on a thermal beam of metastable H* (2s) atoms, with a radial transverse gradient (atomic “axicon”)
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