Many-body interband tunneling as a witness for complex dynamics in the Bose-Hubbard model
arXiv:0704.0233 · doi:10.1103/PhysRevLett.98.130402
Abstract
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, spinless atoms in quasi-one dimensional optical lattices subjected to a tunable tilting force. The distributions of the computed tunneling rates provide an independent and experimentally accessible signature of the regular-chaotic transition in the strongly correlated many-body dynamics of the ground band.
4 pages, 3 figures