How Landau-Zener tunneling takes time

被引：70
|
作者：
Niu, Q [1 ]
Raizen, MG [1 ]
机构：
[1] Univ Texas, Dept Phys, Austin, TX 78712 USA
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.80.3491
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We calculate the time evolution of Landau-Zener tunneling for atoms in an accelerating optical lattice. Analytical expressions are obtained that are in good agreement with a recent observation of nonexponential decay. We identify new experimental regimes that show a crossover from strong coherent oscillations to exponential decay in the temporal evolution of the survival probability. We establish the time scale of this crossover, and make connection to a tunneling time of Zener breakdown.
引用
收藏
页码：3491 / 3494
页数：4
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