Production of photons in anisotropic spacetimes
Abstract
Under the main aspect of the creation of photon pairs from vacuum, Maxwell's equations in anisotropic universes with a diagonal Bianchi type I metric are investigated. For two axisymmetric expansion laws, exact photon solutions of the Maxwell equations making use of a WKB particle concept are obtained. The number densities of created photons are computed and the importance of singularity avoidance for getting finite results is emphasized. In the case of weak anisotropies the results by Zel'dovich and Starobinsky are regained and commented on.
 Publication:

Classical and Quantum Gravity
 Pub Date:
 November 1990
 DOI:
 10.1088/02649381/7/11/022
 Bibcode:
 1990CQGra...7.2145L
 Keywords:

 Cosmology;
 Photons;
 SpaceTime Functions;
 Anisotropy;
 Maxwell Equation;
 Quantum Electrodynamics;
 Singularity (Mathematics);
 Universe;
 WentzelKramerBrillouin Method;
 Astrophysics