Dynamical properties of ultracold Bose atomic gases in one-dimensional optical lattices created by two schemes

• 来源期刊: 中国物理B（英文版）
• 关键词: optical lattice Bose-Einstein condensate local field effect
• 年，卷（期）: 2019,（9）
• 页码范围: 183-188
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab3448

摘要

An optical lattice could be produced either by splitting an input light (splitting scheme) or by reflecting the input light by a mirror (retro-reflected scheme).We study quantum dynamical properties of an atomic Bose-Einstein condensate (BEC) in the two schemes.Adopting a mean field theory and neglecting collision interactions between atoms,we find that the momentum and spatial distributions of BEC are always symmetric in the splitting scheme which,however,are asymmetric in the retro-reflected scheme.The reason for this difference is due to the local field effect.Furthermore,we propose an effective method to avoid asymmetric diffraction.