Fast momentum-selective transport of Bose-Einstein condensates via controlled non-adiabatic dynamics in optical lattices
The study investigates how to achieve very narrow momentum distributions in ultracold Bose-Einstein condensates using rapid, non-adiabatic manipulation within optical lattices. The key finding is that spectral purity can be maintained even with fast loading and release by timing the ramps precisely with the condensate's internal breathing oscillations, identifying 'magic times' for optimal transport.