Asymmetric Landau-Zener tunneling in a periodic potential -: art. no. 230406

被引：156

作者：

Jona-Lasinio, M ^{[1
]}

Morsch, O ^{[1
]}

Cristiani, M ^{[1
]}

Malossi, N ^{[1
]}

Müller, JH ^{[1
]}

Courtade, E ^{[1
]}

Anderlini, M ^{[1
]}

Arimondo, E ^{[1
]}

机构：

[1] Univ Pisa, Dipartimento Fis E Fermi, INFM, I-56127 Pisa, Italy

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.91.230406

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a simple model for nonlinear Landau-Zener tunneling between two energy bands of a Bose-Einstein condensate in a periodic potential, we find that the tunneling rates for the two directions of tunneling are not the same. Tunneling from the ground state to the excited state is enhanced by the nonlinearity, whereas in the opposite direction it is suppressed. These findings are confirmed by numerical simulations of the condensate dynamics. Measuring the tunneling rates for a condensate of rubidium atoms in an optical lattice, we have found experimental evidence for this asymmetry.

引用

页码：230406 / 230406

页数：4

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