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Transport of atoms in a quantum conveyor belt

Abstract : We have performed experiments using a 3D-Bose-Einstein condensate of sodium atoms in a 1D optical lattice to explore some unusual properties of band-structure. In particular, we investigate the loading of a condensate into a moving lattice and find non-intuitive behavior. We also revisit the behavior of atoms, prepared in a single quasimomentum state, in an accelerating lattice. We generalize this study to a cloud whose atoms have a large quasimomentum spread, and show that the cloud behaves differently from atoms in a single Bloch state. Finally, we compare our findings with recent experiments performed with fermions in an optical lattice.
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Antoine Browaeys, H. Haeffner, C. Mckenzie, S. L. Rolston, K. Helmerson, et al.. Transport of atoms in a quantum conveyor belt. Physical Review A, American Physical Society, 2005, 72, pp.053605. ⟨10.1103/PhysRevA.72.053605⟩. ⟨hal-00687518⟩

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