Geodesics on deformed spheres asymptotically described using the Funk transform

Details Geodesics on deformed spheres asymptotically described using the Funk transform Geodesics on deformed spheres asymptotically described using the Funk transform

2010-03-29

arxiv.org/abs/1003.5449v1

Physics

Mathematical Physics

Scientific paper

We consider geodesics on the surfaces obtained by weak deformations of the standard 2D-sphere. The dynamics of a particle on the surface can be asymptotically described by the averaged evolution of the particle's angular momentum. It is shown that the system describing this evolution has a Hamiltonian, which is obtained by applying the Funk transform to the function defining the deviation of the surface from the standard sphere. This system has the 2D-sphere as its phase space, so it is integrable and its trajectories admit of topological description in terms of its phase portrait on the sphere.

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