Properties of a nematic spin vortex in an antiferromagnetic spin-1 Bose-Einstein condensate

被引：8

作者：

Underwood, Andrew P. C. ^{[1
,2
]}

Baillie, D. ^{[1
,2
]}

Blakie, P. Blair ^{[1
,2
]}

Takeuchi, H. ^{[3
,4
]}

机构：

[1] Dodd Walls Ctr Photon & Quantum Technol, Dunedin, New Zealand

[2] Univ Otago, Dept Phys, Dunedin 9016, New Zealand

[3] Osaka City Univ, Dept Phys, Osaka 5588585, Japan

[4] Osaka City Univ, Nambu Yoichiro Inst Theoret & Expt Phys NITEP, Osaka 5588585, Japan

来源：

PHYSICAL REVIEW A | 2020年 / 102卷 / 02期

关键词：

PHASE;

D O I：

10.1103/PhysRevA.102.023326

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A spin-1 condensate with antiferromagnetic interactions supports nematic spin vortices in the easy-plane polar phase. These vortices have a 2 pi winding of the nematic director with a core structure that depends on the quadratic Zeeman energy. We characterize the properties of the nematic spin vortex in a uniform quasi-two-dimensional system. We also obtain the vortex excitation spectrum and use it to quantify its stability against dissociating into two half-quantum vortices, finding a parameter regime where the nematic spin vortex is dynamically stable. These results are supported by full dynamical simulations.

引用

页数：10

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