The Generalized Jacobi Equation
arXiv:gr-qc/0203073 · doi:10.1088/0264-9381/19/16/301
Abstract
The Jacobi equation in pseudo-Riemannian geometry determines the linearized geodesic flow. The linearization ignores the relative velocity of the geodesics. The generalized Jacobi equation takes the relative velocity into account; that is, when the geodesics are neighboring but their relative velocity is arbitrary the corresponding geodesic deviation equation is the generalized Jacobi equation. The Hamiltonian structure of this nonlinear equation is analyzed in this paper. The tidal accelerations for test particles in the field of a plane gravitational wave and the exterior field of a rotating mass are investigated. In the latter case, the existence of an attractor of uniform relative radial motion with speed is pointed out. The astrophysical implications of this result for the terminal speed of a relativistic jet is briefly explored.
LaTeX file, 4 PS figures, 28 pages, revised version, accepted for publication in Classical and Quantum Gravity
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