title: Stable Core Symmetries and Confined Textures for a Vortex Line in a Spinor Bose-Einstein Condensate.
abstract: We show how a singly quantized vortex can exhibit energetically stable defect cores with different symmetries in an atomic spin-1 polar Bose-Einstein condensate, and how a stable topologically nontrivial Skyrmion texture of lower dimensionality can be confined inside the core. The core isotropy and the stability of the confined texture are sensitive to Zeeman level shifts. The observed structures have analogies, respectively, in pressure-dependent symmetries of superfluid liquid ^{3}He vortices and in the models of superconducting cosmic strings.
authors.affiliation: Mathematical Sciences, University of Southampton, SO17 1BJ Southampton, United Kingdom.
authors.forename: Magnus O
authors.initials: MO
authors.lastname: Borgh
authors.affiliation: Department of Physics, and Research and Education Center for Natural Sciences, Keio University, Hiyoshi 4-1-1, Yokohama, Kanagawa 223-8521, Japan.
authors.forename: Muneto
authors.initials: M
authors.lastname: Nitta
authors.affiliation: Mathematical Sciences, University of Southampton, SO17 1BJ Southampton, United Kingdom.
authors.forename: Janne
authors.initials: J
authors.lastname: Ruostekoski