,Spatiotemporal Bloch states of a spin–orbit coupled Bose–Einstein condensate in an optical lattice

• 作 者: Ya-Wen Wei Chao Kong Wen-Hua Hai
• 机 构: Department of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control o
• 出 处: 中国物理B（英文版）
• 发表日期: 2019年5期
• 关键词: Bose–Einstein condensate spin–orbit coupling spatiotemporal Bloch state spin–mot

We study the spatiotemporal Bloch states of a high-frequency driven two-component Bose–Einstein condensate (BEC) with spin–orbit coupling (SOC) in an optical lattice. By adopting the rotating-wave approximation (RWA) and applying an exact trial-solution to the corresponding quasistationary system, we establish a different method for tuning SOC via exteal field such that the existence conditions of the exact particular solutions are fitted. Several novel features related to the exact states are demonstrated;for example, SOC leads to spin–motion entanglement for the spatiotemporal Bloch states, SOC increases the population imbalance of the two-component BEC, and SOC can be applied to manipulate the stable atomic flow which is conducive to control quantum transport of the BEC for different application purposes.