Physics
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvd..70b4012p&link_type=abstract
Physical Review D, vol. 70, Issue 2, id. 024012
Physics
7
Canonical Formalism, Lagrangians, And Variational Principles, Classical Field Theories
Scientific paper
The “geometric” and the “dynamic” variational principles are extended to the case of a classical test particle coupled with an external field through a scalar, velocity-independent term U. The relative Lagrangians are determined, and a super-Hamiltonian derivation of Hamilton-Jacobi equation for this case is also given. Consistency of results is shown throughout. Results thus found are then specialized to the case of the curved-spacetime motion of a classical polarized test particle, subject to the influence of an external electromagnetic field. We also consider the behavior of a spinning classical polarized test particle in a curved spacetime: the equations of motion are given, together with the equations describing the evolution of the spin.
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