标题： 两组分玻色-爱因斯坦凝聚体中涡旋的复合结构 显示英文标题

标题： Composite structure of vortices in two-component Bose-Einstein condensate

摘要： 与单组分玻色-爱因斯坦凝聚体的情况相反，双组分凝聚体中的涡旋可以具有各种复杂的结构。 本文研究了空间均匀玻色-爱因斯坦凝聚体中的涡旋。 结果表明，涡旋结构由三个无量纲参数描述。 这与通常的单组分凝聚体情况完全不同，在单组分凝聚体中，孤立涡旋由一个无参数的无量纲方程描述。 双组分涡旋结构强烈依赖于各组分“相互作用”常数的符号。 探索了几种具有不同定性结构的涡旋类型。 我们表明，当“相互作用”常数为正时，可以存在超密度涡旋。 超密度涡旋的轴附近密度大于均匀空间玻色-爱因斯坦凝聚体的平衡密度。 我们还表明，可以在轴附近和远离轴处出现凝聚组分旋转方向相反的涡旋。 显示英文摘要

摘要： In contrast to one-component Bose-Einstein condensate case, the vortices in two-component condensate can have various complicated structures. The vortices in a space-homogeneous Bose-Einstein condensate have been studied in this paper. It is shown that the vortex structure is described by three dimensionless parameters. This is totally different from the usual one-component condensate case, where an isolated vortex is described by a parameter-less dimensionless equation. The two-component vortex structure strongly depends on the sign of "interaction" constant of the components. A few types of vortices with different qualitative structure are explored. We show that the super-density vortices can exist, when the "interaction" constant is positive. The super-density vortices have the near-axis density greater than the equilibrium density of a homogeneous space Bose-Einstein condensate. We also show that the vortices with opposite direction of the condensate component rotation near the axis and far off the axis can exist.