Spin-geodesic deviations in the Schwarzschild spacetime

Details Spin-geodesic deviations in the Schwarzschild spacetime Spin-geodesic deviations in the Schwarzschild spacetime

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011gregr..43..959b&link_type=abstract

General Relativity and Gravitation, Volume 43, Issue 4, pp.959-975

Mathematics

2

Spinning Test Particles, Schwarzschild Spacetime

Scientific paper

The deviation of the path of a spinning particle from a circular geodesic in the Schwarzschild spacetime is studied by an extension of the idea of geodesic deviation. Within the Mathisson-Papapetrou-Dixon model and assuming the spin parameter to be sufficiently small so that it makes sense to linearize the equations of motion in the spin variables as well as in the geodesic deviation, the spin-curvature force adds an additional driving term to the second order system of linear ordinary differential equations satisfied by nearby geodesics. Choosing initial conditions for geodesic motion leads to solutions for which the deviations are entirely due to the spin-curvature force, and one finds that the spinning particle position for a given fixed total spin oscillates roughly within an ellipse in the plane perpendicular to the motion, while the azimuthal motion undergoes similar oscillations plus an additional secular drift which varies with spin orientation.

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