- School of Physics - Research Publications
School of Physics - Research Publications
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ItemTransport and disruption of Bose-Einstein condensates in optical latticesScott, RG ; Martin, AM ; Bujkiewicz, S ; Fromhold, TM ; Malossi, N ; Morsch, O ; Cristiani, M ; Arimondo, E (AMER PHYSICAL SOC, 2004-03)
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ItemAnomalous quantum reflection of Bose-Einstein condensates from a silicon surface: The role of dynamical excitationsScott, RG ; Martin, AM ; Fromhold, TM ; Sheard, FW (AMERICAN PHYSICAL SOC, 2005-08-12)We investigate the effect of interatomic interactions on the quantum-mechanical reflection of Bose-Einstein condensates from regions of rapid potential variation. The reflection process depends critically on the density and incident velocity of the condensate. For low densities and high velocities, the atom cloud has almost the same form before and after reflection. Conversely, at high densities and low velocities, the reflection process generates solitons and vortex rings that fragment the condensate. We show that this fragmentation can explain the anomalously low reflection probabilities recently measured for low-velocity condensates incident on a silicon surface.