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General Relativity and Quantum Cosmology

arXiv:1009.1761 (gr-qc)
[Submitted on 9 Sep 2010 (v1), last revised 25 May 2011 (this version, v2)]

Title:The speed of gravity in general relativity

Authors:S. Krasnikov
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Abstract:The question is discussed of what is the speed of gravity (at the fundamental non-perturbative level). The question is important, if nowhere else, in discussing the problem of information "lost" in black holes. It turns out that the duly defined "gravitational signal" generally may be causal, superluminal and "semi-superluminal". In the class of globally hyperbolic spacetimes the two last varieties coincide. And if some (often imposed, but not always satisfied) conditions hold, the signals may be \emph{only} causal. In this sense the speed of gravity does not exceed the speed of light.
Comments: typos corrected, etc
Subjects: General Relativity and Quantum Cosmology (gr-qc)
Cite as: arXiv:1009.1761 [gr-qc]
  (or arXiv:1009.1761v2 [gr-qc] for this version)
  https://doi.org/10.48550/arXiv.1009.1761
Journal reference: Grav.Cosmol.17:194-197,2011
Related DOI: https://doi.org/10.1134/S0202289311020150

Submission history

From: Serguei Krasnikov [view email]
[v1] Thu, 9 Sep 2010 12:53:25 UTC (14 KB)
[v2] Wed, 25 May 2011 14:03:23 UTC (14 KB)
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