Formulation of a constrained system in terms of extended Lagrangian and its local symmetries

Details Formulation of a constrained system in terms of extended Lagrangian and its local symmetries Formulation of a constrained system in terms of extended Lagrangian and its local symmetries

2007-08-26

arxiv.org/abs/0708.3511v2

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

It is shown that an arbitrary singular Lagrangian theory (with first and second class constraints up to $N$-th stage in the Hamiltonian formulation) can be reformulated as a theory with at most third-stage constraints. The corresponding Lagrangian $\tilde L$ can be obtained by pure algebraic methods, its manifest form in terms of quantities of the initial formulation is found. Local symmetries of $\tilde L$ are obtained in closed form. All the first class constraints of the initial Lagrangian turn out to be gauge symmetry generators for $\tilde L$.

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