Geometry and Dynamics with Time-Dependent Constraints
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We describe how geometrical methods can be applied to a system with explicitly time-dependent second-class constraints so as to cast it in Hamiltonian form on its physical phase space. Examples of particular interest are systems which require time-dependent gauge fixing conditions in order to reduce them to their physical degrees of freedom. To illustrate our results we discuss the gauge-fixing of relativistic particles and strings moving in arbitrary background electromagnetic and antisymmetric tensor fields.
8 pages, Plain TeX, CERN-TH.7392/94 and MPI-PhT/94-45
8 pages, Plain TeX, CERN-TH.7392/94 and MPI-PhT/94-45