Birefringent light propagation on anisotropic cosmological backgrounds
Author
dc.contributor.author
Asenjo, Felipe A.
Author
dc.contributor.author
Hojman Guiñerman, Sergio
Admission date
dc.date.accessioned
2018-06-21T16:24:01Z
Available date
dc.date.available
2018-06-21T16:24:01Z
Publication date
dc.date.issued
2017
Cita de ítem
dc.identifier.citation
Physical Review D 96, 044021 (2017)
es_ES
Identifier
dc.identifier.other
10.1103/PhysRevD.96.044021
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/149122
Abstract
dc.description.abstract
Exact electromagnetic wave solutions to Maxwell equations on anisotropic Bianchi I cosmological spacetime backgrounds are studied. The waves evolving on Bianchi I spacetimes exhibit birefringence (associated with linear polarization) and dispersion. The particular case of a vacuum-dominated anisotropic Universe, which reproduces a Friedmann-Robertson-Walker Universe (for late times)-while, for earlier times, it matches a Kasner Universe-is studied. The electromagnetic waves do not, in general, follow null geodesics. This produces a modification of the cosmological redshift, which is then dependent on light polarization, its dispersion, and its non-null geodesic behavior. New results presented here may help to tackle some issues related to the "horizon" problem.