1997/08/11 by A. D. Dolgov, И. Б. Хриплович, I. B. Khriplovich · 8 citations
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Classical mechanics #Field (mathematics) #Front (military) #Gravitational field #Gravitational wave #Group velocity #High-pressure geophysics and materials #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Massless particle #Mathematics #Meteorology #Optics #Physics #Quantum electrodynamics #Quantum mechanics #Speed of light (cellular automaton) #Wave packet #Wave propagation #gr-qc #hep-th
paper · pdf · doi:10.1016/s0375-9601(98)00203-5
published in Physics Letters A 243(3), 117-120 (Elsevier BV) · 6 pages, latex twice
arxiv created 1997/08/11 · openalex publication_date 1998/06/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.