Abstract
We study the dynamics of a Bose-Einstein condensatewavepacket trapped in an optical lattice. In the tight-bindinglimit, the system maps onto a discrete nonlinear Schrödingerequation. Using a collective coordinate approximation, weinvestigate different dynamical regimes: diffusive (in whichthe boson wavepacket spreads out), self-trapped (with aself-induced pinning), breathing (where the centre of mass ofthe wavepacket moves with an oscillating width), and solitonic(in which the wavepacket shape is exactly preserved duringthe dynamics).
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More From: Journal of Physics B: Atomic, Molecular and Optical Physics
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