Abstract
Multi-component Bose-Einstein condensates provide opportunities
to explore experimentally the wealth of physics associated
with the spin degrees of freedom. The ground-state properties and line-like vortex excitations of these quantum
systems have been studied theoretically. In principle, nontrivial
spin textures consisting of point-like topological excitations, or
skyrmions, could exist in a multi-component Bose-Einstein
condensate, owing to the
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