Velocity of signal in attractive potential and propagation of light in gravitational field

Details Velocity of signal in attractive potential and propagation of light in gravitational field Velocity of signal in attractive potential and propagation of light in gravitational field

1997-08-11

arxiv.org/abs/hep-th/9708056v1

Phys.Lett. A243 (1998) 117-120

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, latex twice

Scientific paper

10.1016/S0375-9601(98)00203-5

The propagation of a massless field in attractive and repulsive potentials is considered. It is shown that though the group velocity in such potentials can be larger than one, the wave front propagates with the speed of light. A larger-than-one group velocity leads only to a strong deformation of the wave packet. The results obtained are applied to the light propagation in a gravitational field. An erroneous assertion concerning the last problem, recently made in the literature, is refuted.

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