Tomadin, Andrea and Mannella, Riccardo and Wimberger, Sandro (2008) Many-body Landau-Zener tunneling in the Bose-Hubbard model. Physical review a, 77 (1). ISSN 1050-2947
Full text not available from this repository.Abstract
We study a model for ultracold, spinless atoms in quasi-one-dimensional optical lattices and subjected to a tunable tilting force. Statistical tests are employed to quantitatively characterize the spectrum of the Floquet-Bloch operator of the system along the transition from the regular to the quantum chaotic regime. Moreover, we perturbatively include the coupling of the one-band model to the second energy band. This allows us to study the Landau-Zener interband tunneling within a truly many-body description of ultracold atoms. The distributions of the computed tunneling rates provide an independent and experimentally accessible signature of the regular-chaotic transition.