We demonstrate a spatially resolved autocorrelation measurement with a Bose-Einstein condensate (BEC) and measure the evolution of the spatial profile of its quantum mechanical phase. After releasing the BEC from the magnetic trap, the phase develops a quadratic form which we measure. Our experiments reveal the effects of the repulsive interaction between two overhapping BEC wavepackets and we measure the small momentum they impart to each other.
Citation: Physical Review Letters
Issue: No. 10
Pub Type: Journals
autocorrelation, Bose-Einstein condensation, bragg diffraction, laser cooling, matter-wave interferometer