title: Many-body interband tunneling as a witness of complex dynamics in the Bose-Hubbard model.
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.
authors.affiliation: Dipartimento di Fisica, Unversità degli Studi di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Tomadin
authors.forename: Riccardo
authors.initials: R
authors.lastname: Mannella
authors.forename: Sandro
authors.initials: S
authors.lastname: Wimberger