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Observation of photon-assisted tunneling in optical lattices
C. Sias, H. Lignier, Y. P. Singh +4
We have observed tunneling suppression and photon-assisted tunneling of Bose-Einstein condensates in an optical lattice subjected to a constant force plus a sinusoidal shaking. For…
Sympathetic cooling and collisional properties of a Rb-Cs mixture
M. Anderlini, E. Courtade, M. Cristiani +5
We report on measurements of the collisional properties of a mixture of Cs and Rb atoms in a magnetic trap at temperatures. By selectively evaporating…
Asymmetric Landau-Zener tunneling in a periodic potential
M. Jona-Lasinio, O. Morsch, M. Cristiani +5
Using a simple model for nonlinear Landau-Zener tunneling between two energy bands of a Bose-Einstein condensate in a periodic potential, we find that the tunneling rates for the t…
Hitting a BEC with a comb: Evolution of interference patterns inside a magnetic trap
J. H. Müller, O. Morsch, M. Cristiani +2
We study the evolution inside a harmonic trap of Bose-Einstein condensates released from the periodic potential of an optical lattice. After a time-of-flight, harmonic motion of th…
Free expansion of a Bose-Einstein condensate in a 1D optical lattice
O. Morsch, M. Cristiani, J. H. Müller +2
We have experimentally investigated the free expansion of a Bose-Einstein condensate in an array of two-dimensional traps created by a one-dimensional optical lattice. If the conde…
Experimental properties of Bose-Einstein condensates in 1D optical lattices: Bloch oscillations, Landau-Zener tunneling and mean-field effects
M. Cristiani, O. Morsch, J. H. Müller +2
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…