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Creation of discrete solitons and observation of the Peierls-Nabarro barrier in Bose-Einstein Condensates
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Creation of discrete solitons and observation of the Peierls-Nabarro barrier in Bose-Einstein Condensates
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We analyze the generation and mobility of discrete solitons in Bose-Einstein condensates confined in an optical lattice under realistic experimental conditions. We discuss first the creation of 1D discrete solitons, for both attractive and repulsive interatomic interactions. We then address the issue of their mobility, focusing our attention on the conditions for the experimental observability of the Peierls-Nabarro barrier. Finally we report on the generation of self-trapped structures in two and three dimensions. Discrete solitons may open alternative routes for the manipulation and transport of Bose-Einstein condensates.
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