TY - JOUR

T1 - Many-body Landau-Zener tunneling in the Bose-Hubbard model

AU - Tomadin, Andrea

AU - Mannella, Riccardo

AU - Wimberger, Sandro

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevA.77.013606

DO - 10.1103/PhysRevA.77.013606

M3 - Journal article

VL - 77

JO - Physical review a

JF - Physical review a

SN - 1050-2947

IS - 1

M1 - 013606

ER -