Classical O(N) nonlinear sigma model on the half line: a study on consistent Hamiltonian description

Abstract

The problem of consistent Hamiltonian structure for O(N) nonlinear sigma model in the presence of five different types of boundary conditions is considered in detail. For the case of Neumann, Dirichlet and the mixture of these two types of boundaries, the consistent Poisson brackets are constructed explicitly, which may be used, e.g. for the construction of current algebras in the presence of boundary. While for the mixed boundary conditions and the mixture of mixed and Dirichlet boundary conditions, we prove that there is no consistent Poisson brackets, showing that the mixed boundary conditions are incompatible with all nontrivial subgroups of $O((N)$.

revtex4, 7pp, bibtex

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Cited by in corpus (5)

• Doubly Special Relativity in Position Space Starting from the Conformal Group
• Classically integrable boundary conditions for symmetric-space sigma models
• On integrable boundaries in the 2 dimensional $O(N)$ $\sigma$-models
• The Reduced Phase Space of An Open String in The Background B-Field
• Supersymmetric WZW $\sigma$ Model on Full and Half Plane