Fringe spacing and phase of interfering matter waves
arXiv:cond-mat/0601690 · doi:10.1103/PhysRevA.73.063613
Abstract
We experimentally investigate the outcoupling of atoms from Bose-Einstein condensates using two radio-frequency (rf) fields in the presence of gravity. We show that the fringe separation in the resulting interference pattern derives entirely from the energy difference between the two rf fields and not the gravitational potential difference. We subsequently demonstrate how the phase and polarisation of the rf radiation directly control the phase of the matter wave interference and provide a semi-classical interpretation of the results.
arXiv comment4 pages, 3 figures
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