Ground States of Spin-orbit Coupled Bose-Einstein Condensates in the Presence of Sextupole Magnetic Field

2020 ◽  
Vol 26 (1) ◽  
pp. 33-39
Author(s):  
张瑞芳 ZHANG Rui-fang ◽  
李禄 LI Lu
Keyword(s):  
Magnetic Field ◽  
Ground States ◽  
Spin Orbit ◽  
Bose Einstein

Manipulating Vortices in F=2 Bose-Einstein Condensates through Magnetic Field and Spin-Orbit Coupling

2021 ◽  
Author(s):  
Hao Zhu ◽  
Shou-Gen Yin ◽  
Wu-Ming Liu
Keyword(s):  
Magnetic Field ◽  
Phase Separation ◽  
Ground State ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Topological Excitations ◽  
Coupling Strengths ◽  
Bose Einstein ◽  
Particle Current

Abstract We investigate the vortex structures excited by Ioffe-Pritchard magnetic field and Dresselhaus-type spin-orbit coupling in F = 2 ferromagnetic Bose-Einstein condensates. In the weakly interatomic interacting regime, an external magnetic field can generate a polar-core vortex in which the canonical particle current is zero. With the combined effect of spin-orbit coupling and magnetic field, the ground state experiences a transition from polar-core vortex to Mermin-Ho vortex, in which the canonical particle current is anticlockwise. For fixed spin-orbit coupling strengths, the evolution of phase winding, magnetization and degree of phase separation with magnetic field are studied. Additionally, with further increasing spin-orbit coupling strength, the condensate exhibits symmetrical density domains separated by radial vortex arrays. Our work paves the way to explore exotic topological excitations in high-spin system.

scholarly journals SU(3) Spin–Orbit Coupled Rotating Bose–Einstein Condensate Subject to a Gradient Magnetic Field

2021 ◽  
Vol 9 ◽  
Author(s):  
Guang-Ping Chen ◽  
Pu Tu ◽  
Chang-Bing Qiao ◽  
Jin-Xia Zhu ◽  
Qi Jia ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Einstein Condensate ◽  
Orbit Coupling ◽  
Ground State Structure ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
State Structure ◽  
Gradient Magnetic Field ◽  
Bose Einstein Condensate ◽  
Bose Einstein

We consider a harmonically trapped rotating spin-1 Bose–Einstein condensate with SU(3) spin–orbit coupling subject to a gradient magnetic field. The effects of SU(3) spin–orbit coupling, rotation, and gradient magnetic field on the ground-state structure of the system are investigated in detail. Our results show that the interplay among SU(3) spin–orbit coupling, rotation, and gradient magnetic field can result in a variety of ground states, such as a vortex ring and clover-type structure. The numerical results agree well with our variational analysis results.

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