Vortex Dynamics in Trapped Bose-Einstein Condensate

被引：0
作者：
Enikő J. M. Madarassy
Carlo F. Barenghi
机构：
[1] Newcastle University,School of Mathematics
来源：
Journal of Low Temperature Physics | 2008年 / 152卷
关键词：
Quantized vortices; Bose-Einstein condensate; Dissipation; Vortex dynamics; 03.75.Lm; 47.37.+q;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We perform numerical simulations of vortex motion in a trapped Bose-Einstein condensate by solving the two-dimensional Gross-Pitaevskii Equation in the presence of a simple phenomenological model of interaction between the condensate and the finite temperature thermal cloud. At zero temperature, the trajectories of a single, off-centred vortex precessing in the condensate, and of a vortex-antivortex pair orbiting within the trap, excite acoustic emission. At finite temperatures the vortices move to the edge of the condensate and vanish. By fitting the finite-temperature trajectories, we relate the phenomenological damping parameter to the friction coefficients α and α′, which are used to describe the interaction between quantised vortices and the normal fluid in superfluid helium.
引用
收藏
页码：122 / 135
页数：13
相关论文
共 62 条
[1]  
Anderson B.P.(2000)J Dalibard Phys. Rev. Lett. 85 2857-4060
[2]  
Haljan P.C.(2004)undefined Mod. Phys. Lett. B 18 30-2619
[3]  
Wieman C.E.(2002)undefined Phys. Rev. Lett. 89 200403-undefined
[4]  
Cornell E.A.(1999)undefined Phys. Rev. A 60 R1779-undefined
[5]  
Kevrekidis P.G.(2004)undefined Phys. Rev. A 69 053623-undefined
[6]  
Carretero-Gonzalez R.(2007)undefined Phys. Rev. Lett. 99 145301-undefined
[7]  
Frantzeskakis D.J.(1999)undefined J. Low. Temp. Phys. 116 277-undefined
[8]  
Kevrekidis I.G.(2002)undefined Phys. Rev. Lett. 88 180402-undefined
[9]  
Rosenbusch P.(2002)undefined Phys. Rev. Lett. 89 150402-undefined
[10]  
Bretin V.(1998)undefined Phys. Rev. A 57 4057-undefined
1234567