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Chin. Phys. B, 2015, Vol. 24(7): 076701    DOI: 10.1088/1674-1056/24/7/076701
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Phase diagram and collective modes in Rashba spin–orbit coupled BEC: Effect of in-plane magnetic field

Dong Dong (董冬), Zou Xu-Bo (邹旭波), Guo Guang-Can (郭光灿)
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
Abstract  

We studied the system of pure Rashba spin–orbit coupled Bose gas with an in-plane magnetic field. Based on the mean field theory, we obtained the zero temperature phase diagram of the system which exhibits three phases, plane wave (PW) phase, striped wave (SW) phase, and zero momentum (ZM) phase. It was shown that with a growing in-plane field, both SW and ZM phases will eventually turn into the PW phase. Furthermore, we adopted the Bogoliubov theory to study the excitation spectrum as well as the sound speed.

Keywords:  Rashba spin-orbit coupling      excitation spectrum      in-plane magnetic field  
Received:  08 March 2015      Revised:  14 April 2015      Accepted manuscript online: 
PACS:  67.85.Fg (Multicomponent condensates; spinor condensates)  
  05.30.Jp (Boson systems)  
  03.75.Mn (Multicomponent condensates; spinor condensates)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant No. 10774088).

Corresponding Authors:  Zou Xu-Bo     E-mail:  xbz@ustc.edu.cn

Cite this article: 

Dong Dong (董冬), Zou Xu-Bo (邹旭波), Guo Guang-Can (郭光灿) Phase diagram and collective modes in Rashba spin–orbit coupled BEC: Effect of in-plane magnetic field 2015 Chin. Phys. B 24 076701

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