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Gravitational ultrarelativistic spin-orbit interaction and the weak equivalence principle

Roman Plyatsko
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Abstract

It is shown that the gravitational ultrarelativistic spin-orbit interaction violates the weak equivalence principle in the traditional sense. This fact is a direct consequence of the Mathisson-Papapetrou equations in the frame of reference comoving with a spinning test particle. The widely held assumption that the deviation of a spinning test body from a geodesic trajectory is caused by tidal forces is not correct

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Roman Plyatsko. 2005-07-07. Gravitational ultrarelativistic spin-orbit interaction and the weak equivalence principle. https://doi.org/10.1103/physrevd.58.084031

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