What is faster—light or gravity?
From MaRDI portal
Publication:5254335
DOI10.1088/0264-9381/32/7/075002zbMATH Open1328.83039arXiv1408.6813OpenAlexW1966422731MaRDI QIDQ5254335
Author name not available (Why is that?)
Publication date: 9 June 2015
Published in: (Search for Journal in Brave)
Abstract: General relativity lacks the notion of the speed of gravity. This is inconvenient and the present paper is aimed at filling this gap up. To that end I introduce the concept of the "alternative" and argue that its variety called the "superluminal alternative" describes exactly what one understands by the "superluminal gravitational signal". Another, closely related, object called the "semi-superluminal alternative" corresponds to the situation in which a massive (and therefore gravitating) body reaches its destination sooner than a photon emph{would}, be the latter sent emph{instead} of the body. I prove that in general relativity constrained by the condition that only globally hyperbolic spacetimes are allowed 1) semi-superluminal alternatives are absent and 2) under some natural conditions and conventions admissible superluminal alternative are absent too.
Full work available at URL: https://arxiv.org/abs/1408.6813
No records found.
No records found.
This page was built for publication: What is faster—light or gravity?
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q5254335)
