Tomadin Andrea, Mannella Riccardo, Wimberger Sandro
Dipartimento di Fisica, Unversità degli Studi di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy.
Phys Rev Lett. 2007 Mar 30;98(13):130402. doi: 10.1103/PhysRevLett.98.130402. Epub 2007 Mar 27.
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.
研究了一种微扰模型，用于多粒子态从基带到第一激发能带的隧穿，该模型模拟了处于准一维光学晶格中的超冷、无自旋原子在可调倾斜力作用下的朗道 - 齐纳衰变。计算得到的隧穿率分布为基带强关联多体动力学中的规则 - 混沌转变提供了一个独立且可通过实验获取的特征。
