arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.03556cond-mat.quant-gascond-mat.other
收藏

向列自旋玻色-爱因斯坦凝聚体中的量子椭圆涡

Quantum Elliptic Vortex in a Nematic-Spin Bose-Einstein Condensate

Hiromitsu Takeuchi

摘要:

我们在理论上发现了自旋超流体中的一种新的拓扑缺陷。在向列自旋玻色-爱因斯坦凝聚体中,量子化的涡旋自发地打破其轴对称性,导致椭圆形涡旋的出现,并伴有较小的正二次塞曼效应。新的涡被认为是传统涡的Joukowski变换。当塞曼长度超过自旋修复长度时,它的扁率会增加。这种结构是通过平衡连接两个自旋点的孤子的流体动力学势和弹性来维持的,这可以通过原位磁化成像来观察。理论分析清楚地定义了自旋为1的凝聚体中极性相和反铁磁相的半量子涡旋之间的区别。

英文摘要:

We find a novel topological defect in a spin-nematic superfluid theoretically. A quantized vortex spontaneously breaks its axisymmetry, leading to an elliptic vortex in nematic-spin Bose-Einstein condensates with small positive quadratic Zeeman effect. The new vortex is considered the Joukowski transform of a conventional vortex. Its oblateness grows when the Zeeman length exceeds the spin healing length. This structure is sustained by balancing the hydrodynamic potential and the elasticity of a soliton connecting two spin spots, which are observable by in situ magnetization imaging. The theoretical analysis clearly defines the difference between half quantum vortices of the polar and antiferromagnetic phases in spin-1 condensates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑