中国物理B ›› 2019, Vol. 28 ›› Issue (5): 56701-056701.doi: 10.1088/1674-1056/28/5/056701

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

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

Ya-Wen Wei(魏娅雯), Chao Kong(孔超), Wen-Hua Hai(海文华)   

  1. Department of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2018-10-31 修回日期:2019-02-06 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Wen-Hua Hai E-mail:whhai2005@aliyun.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11475060).

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

Ya-Wen Wei(魏娅雯), Chao Kong(孔超), Wen-Hua Hai(海文华)   

  1. Department of Physics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
  • Received:2018-10-31 Revised:2019-02-06 Online:2019-05-05 Published:2019-05-05
  • Contact: Wen-Hua Hai E-mail:whhai2005@aliyun.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11475060).

摘要:

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 external 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.

关键词: Bose-Einstein condensate, spin-orbit coupling, spatiotemporal Bloch state, spin-motion entanglement, stable atomic flow, high-frequency limit

Abstract:

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 external 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.

Key words: Bose-Einstein condensate, spin-orbit coupling, spatiotemporal Bloch state, spin-motion entanglement, stable atomic flow, high-frequency limit

中图分类号:  (Bose-Einstein condensates in optical potentials)

  • 67.85.Hj
03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations) 71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 05.60.Gg (Quantum transport)