title: D-brane solitons and boojums in field theory and Bose-Einstein condensates.
abstract: In certain field theoretical models, composite solitons consisting of a domain wall and vortex lines attached to the wall have been referred to as 'D-brane solitons'. We show that similar composite solitons can be realized in phase-separated two-component Bose-Einstein condensates. We discuss the similarities and differences between topological solitons in the Abelian-Higgs model and those in two-component Bose-Einstein condensates. On the basis of the formulation of gauge theory, we introduce the 'boojum charge' to characterize the D-brane soliton in Bose-Einstein condensates.
authors.affiliation: Department of Physics, Kinki University, Higashi-Osaka, 577-8502, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Kasamatsu
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Takeuchi
authors.forename: Muneto
authors.initials: M
authors.lastname: Nitta
mesh_terms: D003198:Computer Simulation; D004574:Electromagnetic Fields; D008956:Models, Chemical; D008958:Models, Molecular; D044367:Phase Transition