Topological spinor vortex matter on spherical surface induced by non-Abelian spin-orbital-angular-momentum coupling

被引：4

作者：

Cheng, Jia-Ming ^{[1
,2
]}

Gong, Ming ^{[1
,2
]}

Guo, Guang-Can ^{[1
,2
]}

Zhou, Zheng-Wei ^{[1
,2
]}

Zhou, Xiang-Fa ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phy, Hefei 230026, Peoples R China

来源：

NEW JOURNAL OF PHYSICS | 2019年 / 21卷 / 12期

基金：

中国国家自然科学基金;

关键词：

spinor vortex; spin-orbital-angular-momentum coupling; spherical surface; topology; BOSE; PHASE; ATOM;

D O I：

10.1088/1367-2630/ab5f43

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a scheme to implement non-Abelian spin-orbital-angular-momentum (SOAM) coupling in spinor Bose-Einstein condensates using magnetic gradient coupling. For a spherical surface trap addressable using high-order Hermite-Gaussian beams, we show that this system supports various degenerate ground states carrying different total angular momenta J, and the degeneracy can be tuned by changing the strength of SOAM coupling. For spinor condensates with hyperfine spin F = 1, the system supports various meta-ferromagnetic phases and meta-polar states always described by quantized total mean angular momentum vertical bar < J >vertical bar in case of weak interactions. Polar states with Z(2) symmetry and Thomson lattices formed by defects of spin vortices are also discussed. The system can be used to prepare various stable spin vortex states with nontrivial topology, and serve as a platform to investigate strong-correlated physics of neutral atoms with tunable ground-state degeneracy.

引用

页数：17

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