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Role of transverse excitations in the instability of Bose-Einstein condensates moving in optical lattices
M. Modugno, C. Tozzo, F. Dalfovo
The occurrence of energetic and dynamical instabilities in a Bose-Einstein condensate moving in a one-dimensional (1D) optical lattice is analyzed by means of the Gross-Pitaevskii…
Observation of dynamical instability for a Bose-Einstein condensate in a moving 1D optical lattice
L. Fallani, L. De Sarlo, J. E. Lye +4
We have experimentally studied the unstable dynamics of a harmonically trapped Bose-Einstein condensate loaded into a 1D moving optical lattice. The lifetime of the condensate in s…
Dynamics of a Bose-Einstein condensate at finite temperature in an atomoptical coherence filter
F. Ferlaino, P. Maddaloni, S. Burger +4
The macroscopic coherent tunneling through the barriers of a periodic potential is used as an atomoptical filter to separate the condensate and the thermal components of a R…
Spatial interference of coherent atomic waves by manipulation of the internal quantum state
C. Fort, P. Maddaloni, F. Minardi +2
A trapped 87Rb Bose-Einstein condensate is initially put into a superposition of two internal states. Under the effect of gravity and by means of a second transition, we prepare tw…