We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
THE UNBEARABLE BEINGNESS OF LIGHT - Dressingand Undressing Photonsin Black Hole Spacetimes.
- Authors
HOLLOWOOD, TIMOTHY J.; SHORE, GRAHAM M.
- Abstract
Gravitational tidal forces acting on the virtual e+e- cloud surrounding a photon endow spacetime with a nontrivial refractive index. This has remarkable properties unique to gravitational theories including superluminal low-frequency propagation, in apparent violation of causality, and amplification of the renormalized photon field, in apparent violation of unitarity. Using the geometry of null congruences and the Penrose limit, we illustrate these phenomena and their resolution by tracing the history of a photon as it falls into the near-singularity region of a black hole.
- Subjects
BLACK holes; SPACETIME; GRAVITATIONAL fields; CLOUDS; PHOTONS; SUPERLUMINAL effect; REFRACTIVE index
- Publication
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology, 2012, Vol 21, Issue 11, p-1
- ISSN
0218-2718
- Publication type
Article
- DOI
10.1142/S0218271812410039