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A Bose-Einstein condensate may be prepared in a highly elongated harmonictrap with negligible interatomic interactions using a Feshbach resonance. If astrong repulsive interatomic interaction is switched on and the axial trap isremoved to let the condensate evolve freely in the axial direction, a timedependent quantum interference pattern takes place in the short time(Thomas-Fermi) regime, in which the number of peaks of the momentumdistribution increases one by one, whereas the spatial density barely changes.Comment: 4 pages, 5 figure

the european physical journal. d, atomic, molecular and optical physics/the european physical journal. d, atomic, molecular, optical and plasma physics

Momentum interferences of a freely expanding Bose-Einstein condensate due to interatomic interaction change