Bloch oscillations of Bose-Einstein condensates: breakdown and revival.
We investigate the dynamics of Bose-Einstein condensates in a tilted one-dimensional periodic lattice within the mean-field (Gross-Pitaevskii) description. Unlike in the linear case the Bloch oscillations decay because of nonlinear dephasing. Pronounced revival phenomena are observed. These are analyzed in detail in terms of a simple integrable model constructed by an expansion in Wannier-Stark resonance states. We also briefly discuss the pulsed output of such systems for stronger static fields.
Witthaut
D
D
FB Physik, Technische Universität Kaiserslautern, Germany.
Werder
M
M
Mossmann
S
S
Korsch
H J
HJ