Hamiltonian systems with boundaries

Details Hamiltonian systems with boundaries Hamiltonian systems with boundaries

2000-05-16

arxiv.org/abs/hep-th/0005142v3

JHEP 0010 (2000) 042

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, latex, version to appear in JHEP

Scientific paper

10.1088/1126-6708/2000/10/042

Lately, to provide a solid ground for quantization of the open string theory with a constant B-field, it has been proposed to treat the boundary conditions as hamiltonian constraints. It seems that this proposal is quite general and should be applicable to a wide range of models defined on manifolds with boundaries. The goal of the present paper is to show how the boundary conditions can arise as constraints in a purely algebraic fashion within the Hamiltonian approach without any reference to the Lagrangian formulation of the theory. The construction of the boundary Dirac brackets is also given and some subtleties are pointed out. We consider four examples of field theories with boundaries: the topological sigma model, the open string theory with and without a constant $B$-field and electrodynamics with topological term. A curious result for electrodynamics on a manifold with boundaries is presented.

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