Browsing by Author "Ohashi, Keisuke"
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Item Hyper Kahler Quotients and Lumps in SO(N) and USp(N) gauge theories(2008-07-30) Gudnason, Sven Bjarke; Eto, Minoru; Fujimori, Toshiaki; Konishi, Kenichi; Nitta, Muneto; Ohashi, Keisuke; Vinci, WalterItem Large-N CP(N-1) sigma model on a finite interval with the Dirichlet condition(2016-05-15) Ohashi, KeisukeWe study the large-N solution of the bosonic CP(N-1) model on a finite interval |with the Dirichlet conditions. In the literature, this model has been studied with translational invariant ansatz and there an existence of phase transition was found. |We find that this |translational invariant ansatz can not give a solution of the gap equation and |divergence behavior appears around the boundaries, and resultantly |the phase transition do not appear in this system.Item Vortices which do not Abelianize dynamically: Semi-classical origin of non-Abelian monopoles(2008-07-30) Konishi, K.; Ohashi, Keisuke; Dorigoni, Daniele