Birefringent light propagation on anisotropic cosmological backgrounds
Asenjo
F
A
author
Hojman
S
A
author
2017
English
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.
WOS:000407716200007
exported from refbase (show.php?record=756), last updated on Sun, 25 Mar 2018 13:45:21 -0300
text
files/756_Asenjo+Hojman2017.pdf
10.1103/PhysRevD.96.044021
Asenjo+Hojman2017
Physical Review D
Phys. Rev. D
2017
Amer Physical Soc
continuing
periodical
academic journal
96
4
12 pp
2470-0010