Nonadiabatic dynamics of a Bose-Einstein condensate in an optical lattice

被引：49

作者：

Isella, L ^{[1
]}

Ruostekoski, J ^{[1
]}

机构：

[1] Univ Hertfordshire, Dept Phys Astron & Math, Hatfield AL10 9AB, Herts, England

来源：

PHYSICAL REVIEW A | 2005年 / 72卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.72.011601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the nonequilibrium dynamics of a Bose- Einstein condensate that is split in a harmonic trap by turning up a periodic optical lattice potential. We evaluate the dynamical evolution of the phase coherence along the lattice and the number fluctuations in individual lattice sites within the stochastic truncated Wigner approximation when several atoms occupy each site. We show that the saturation of the number squeezing at high lattice strengths, which was observed in recent experiments by Orzel et al. [Science 291, 2386 (2001)] can be explained by the nonadiabaticity of the splitting.

引用

页数：4

共 37 条

[31]

Proukakis NP, 2003, LASER PHYS, V13, P527

[32] Bogoliubov approach to superfluidity of atoms in an optical lattice [J].