124 citations · 864 across the 29 of their papers we have counts for
10 papers · 1 filter
Dissipation induced coherence of a two-mode Bose-Einstein condensate
D. Witthaut, F. Trimborn, S. Wimberger
We discuss the dynamics of a Bose-Einstein condensate in a double-well trap subject to phase noise and particle loss. The phase coherence of a weakly-interacting condensate as well…
Resonant tunneling of Bose-Einstein condensates in optical lattices
Alessandro Zenesini, Carlo Sias, Hans Lignier +7
In this article, we present theoretical as well as experimental results on resonantly enhanced tunneling of Bose-Einstein condensates in optical lattices both in the linear case an…
Engineered quantum tunnelling in extended periodic potentials
Sandro Wimberger, Donatella Ciampini, Oliver Morsch +2
Quantum tunnelling from a tilted, but otherwise periodic potential is studied. Our theoretical and experimental results show that, by controlling the system's parameters, we can en…
Many-body interband tunneling as a witness for complex dynamics in the Bose-Hubbard model
Andrea Tomadin, Riccardo Mannella, Sandro Wimberger
A perturbative model is studied for the tunneling of many-particle states from the ground band to the first excited energy band, mimicking Landau-Zener decay for ultracold, spinles…
Resonantly enhanced tunneling of Bose-Einstein condensates in periodic potentials
C. Sias, A. Zenesini, H. Lignier +4
We report on measurements of resonantly enhanced tunneling of Bose-Einstein condensates loaded into an optical lattice. By controlling the initial conditions of our system we were…
Bose-Einstein condensates in accelerated double-periodic optical lattices: Coupling and Crossing of resonances
D. Witthaut, E. M. Graefe, S. Wimberger +1
We study the properties of coupled linear and nonlinear resonances. The fundamental phenomena and the level crossing scenarios are introduced for a nonlinear two-level system with…