Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2002-02-04
Physics
Condensed Matter
Soft Condensed Matter
11 pages, 14 figures
Scientific paper
10.1103/PhysRevA.65.063612
We report experimental results on the properties of Bose-Einstein condensates in 1D optical lattices. By accelerating the lattice, we observed Bloch oscillations of the condensate in the lowest band, as well as Landau-Zener (L-Z) tunneling into higher bands when the lattice depth was reduced and/or the acceleration of the lattice was increased. The dependence of the L-Z tunneling rate on the condensate density was then related to mean-field effects modifying the effective potential acting on the condensate, yielding good agreement with recent theoretical work. We also present several methods for measuring the lattice depth and discuss the effects of the micromotion in the TOP-trap on our experimental results.
Arimondo Ennio
Ciampini Donatella
Cristiani Matteo
Morsch Oliver
Müller J. H.
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