Two-component Bose–Einstein condensates

Recently, coupled systems of nonlinear Schrödinger equations have been used extensively to describe Bose–Einstein condensates. In this paper, we study the structure of vortices of the coupled nonlinear equations for two-component Bose–Einstein condensates (BEC) in a three-dimensional space. We show that vortices is 1-rectifiable set, and give its mean curvature. In particular, we show that large interspecies scattering length causes vortices for two-component BEC.