Graviton time delay and a speed limit for small black holes in Einstein-Gauss-Bonnet theory
From MaRDI portal
Publication:2636119
DOI10.1007/JHEP11(2015)109zbMATH Open1388.83494arXiv1508.05303OpenAlexW3099636168MaRDI QIDQ2636119
Author name not available (Why is that?)
Publication date: 31 May 2018
Published in: (Search for Journal in Brave)
Abstract: Camanho, Edelstein, Maldacena and Zhiboedov have shown that gravitons can experience a negative Shapiro time delay, i.e. a time advance, in Einstein-Gauss-Bonnet theory. They studied gravitons propagating in singular "shock-wave" geometries. We study this effect for gravitons propagating in smooth black hole spacetimes. For a small enough black hole, we find that gravitons of appropriate polarisation, and small impact parameter, can experience time advance. Such gravitons can also exhibit a deflection angle less than , characteristic of a repulsive short-distance gravitational interaction. We discuss problems with the suggestion that the time advance can be used to build a "time machine". In particular, we argue that a small black hole cannot be boosted to a speed arbitrarily close to the speed of light, as would be required in such a construction.
Full work available at URL: https://arxiv.org/abs/1508.05303
No records found.
No records found.
This page was built for publication: Graviton time delay and a speed limit for small black holes in Einstein-Gauss-Bonnet theory
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q2636119)
