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Chin. Phys. B, 2019, Vol. 28(5): 056701    DOI: 10.1088/1674-1056/28/5/056701

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)
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

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.

Keywords:  Bose-Einstein condensate      spin-orbit coupling      spatiotemporal Bloch state      spin-motion entanglement      stable atomic flow      high-frequency limit  
Received:  31 October 2018      Revised:  06 February 2019      Accepted manuscript online: 
PACS:  67.85.Hj (Bose-Einstein condensates in optical potentials)  
  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)  

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

Corresponding Authors:  Wen-Hua Hai     E-mail:

Cite this article: 

Ya-Wen Wei(魏娅雯), Chao Kong(孔超), Wen-Hua Hai(海文华) Spatiotemporal Bloch states of a spin-orbit coupled Bose-Einstein condensate in an optical lattice 2019 Chin. Phys. B 28 056701

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