Collisions of solitons and vortex rings in cylindrical bose-einstein condensates

被引:24
|
作者
Komineas, S
Brand, J
机构
[1] Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England
[2] Max Planck Inst Phys Complex Syst, D-01187 Dresden, Germany
关键词
D O I
10.1103/PhysRevLett.95.110401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Interactions of solitary waves in a cylindrically confined Bose-Einstein condensate are investigated by simulating their head-on collisions. Slow vortex rings and fast solitons are found to collide elastically contrary to the situation in the three-dimensional homogeneous Bose gas. Strongly inelastic collisions are absent for low density condensates but occur at higher densities for intermediate velocities. The scattering behavior is rationalized by use of dispersion diagrams. During inelastic collisions, spherical shell-like structures of low density are formed and they eventually decay into depletion droplets with solitary-wave features. The relation to similar shells observed in a recent experiment by Ginsberg et al. [Phys. Rev. Lett. 94, 040403 (2005)] is discussed.
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页数:4
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