Geodesic motion in a Kaluza-Klein bubble spacetime

Details Geodesic motion in a Kaluza-Klein bubble spacetime Geodesic motion in a Kaluza-Klein bubble spacetime

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvd..39.3151b&link_type=abstract

Physical Review D (Particles and Fields), Volume 39, Issue 10, 15 May 1989, pp.3151-3154

Physics

6

Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity

Scientific paper

The motion of massive and massless test particles in the geometry of the five-dimensional ``Witten bubble'' spacetime is explored by obtaining the effective radial potential governing this motion. It is found that massive particles are always in bound orbits. Massless particle orbits have a turning point near the bubble wall, but extend to infinity. These results are consistent with the conception of the bubble wall as a perfectly reflecting, expanding sphere whose expansion rate increases with time.

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