Bose-Einstein condensates in 1D optical lattices: nonlinearity and Wannier-Stark spectra

Details Bose-Einstein condensates in 1D optical lattices: nonlinearity and Wannier-Stark spectra Bose-Einstein condensates in 1D optical lattices: nonlinearity and Wannier-Stark spectra

2007-08-03

arxiv.org/abs/0708.0479v1

Physics

Condensed Matter

Other Condensed Matter

Chapter of "Nonlinearities of Periodic Structures and Metamaterials" (edited by C. Denz, S. Flach, and Yu. Kivshar) to be publ

Scientific paper

We present our experimental investigations on the subject of nonlinearity-modified Bloch-oscillations and of nonlinear Landau-Zener tunneling between two energy bands in a rubidium Bose Einstein condensate in an accelerated periodic potential. Nonlinearity introduces an asymmetry in Landau-Zener tunneling. We also present measurements of resonantly enhanced tunneling between the Wannier-Stark energy levels for Bose-Einstein condensates loaded into an optical lattice.

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