MG11 |
Participant |
Sarioglu, Bahtiyar | |
Institution |
Middle East Technical University, - Dept. of Physics, - Ankara - - TURKEY | |
Session |
Talk |
Abstract |
GT6 |
Closed timelike curves and geodesics of Godel-type metrics |
It is shown explicitly that when the characteristic vector field that defines a Godel-type metric is also a Killing vector, there always exist closed timelike or null curves in spacetimes described by such a metric. For these geometries, the geodesic curves are also shown to be characterized by a lower dimensional Lorentz force equation for a charged point particle in the relevant Riemannian background. Moreover, two explicit examples are given for which timelike and null geodesics can never be closed. |