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

作     者：Lorenzo Isella Janne Ruostekoski 

作者机构：Department of Physics Astronomy and Mathematics University of Hertfordshire Hatfield Herts AL10 9AB United Kingdom 

出 版 物：《Physical Review A》 (物理学评论A辑：原子、分子和光学物理学)

年 卷 期：2005年第72卷第1期

页      面：011601(R)-011601(R)页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：BOGOLIUBOV APPROACH QUANTUM-NOISE WAVE-GUIDES ATOMS TRANSITION SUPERFLUID INSULATOR ARRAYS GAS 

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.