Motion of charged particles in spacetimes with magnetic fields of spherical and hyperbolic symmetry

Abstract

The motion of charged particles in spacetimes containing a submanifold of constant positive or negative curvature is considered, with the electromagnetic tensor proportional to the volume two-form form of the submanifold. In the positive curvature case, this describes spherically symmetric spacetimes with a magnetic monopole, while in the negative curvature case, it is a hyperbolic spacetime with magnetic field uniform along hyperbolic surfaces. Constants of motion are found by considering Poisson brackets defined on a phase space with gauge-covariant momenta. In the spherically-symmetric case, we find a correspondence between the trajectories on the Poincaré cone with equatorial geodesics in a conical defect spacetime. In the hyperbolic case, the analogue of the Poincaré cone is defined as a surface in an auxiliary Minkowski spacetime. Explicit examples are solved for the Minkowski, ${\mathrm{AdS}}_4\times S^2$, and the hyperbolic AdS-Reissner--Nordström spacetimes.

34 pages, 8 figures. Typos corrected, Section 4 expanded thanks to the suggestion of the anonymous referee

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