Vortex knots in a Bose-Einstein condensate

被引：78

作者：

Proment, Davide ^{[1
,2
]}

Onorato, Miguel ^{[1
,2
]}

Barenghi, Carlo F. ^{[3
]}

机构：

[1] Univ Turin, Dipartimento Fis, I-10125 Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[3] Newcastle Univ, Sch Math & Stat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

PHYSICAL REVIEW E | 2012年 / 85卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

STABILITY; DYNAMICS; ENERGY;

D O I：

10.1103/PhysRevE.85.036306

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We present a method for numerically building a vortex knot state in the superfluid wave function of a Bose-Einstein condensate. We integrate in time the governing Gross-Pitaevskii equation to determine evolution and shape preservation of the two (topologically) simplest vortex knots which can be wrapped over a torus. We find that the velocity of a vortex knot depends on the ratio of poloidal and toroidal radius: for smaller ratio, the knot travels faster. Finally, we show how vortex knots break up into vortex rings.

引用

页数：8

共 37 条

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