Bloch oscillations and mean-field effects of Bose-Einstein condensates in 1D optical lattices -: art. no. 140402

被引：488

作者：

Morsch, O ^{[1
]}

Müller, JH ^{[1
]}

Cristiani, M ^{[1
]}

Ciampini, D ^{[1
]}

Arimondo, E ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.87.140402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have loaded Bose-Einstein condensates into one-dimensional, off-resonant optical lattices and accelerated them by chirping the frequency difference between the two lattice beams. For small values of the lattice well depth, Bloch oscillations were observed. Reducing the potential depth further, Landau-Zener tunneling out of the lowest lattice band, leading to a breakdown of the oscillations, was also studied and used as a probe for the effective potential resulting from mean-field interactions as predicted by Choi and Niu [Phys. Rev. Lett. 82, 2022 (1999)]. The effective potential was measured for various condensate densities and trap geometries, yielding good qualitative agreement with theoretical calculations.

引用

页码：140402/1 / 140402/4

页数：4

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