https://doi.org/10.1140/epjc/s10052-015-3477-7
Regular Article - Theoretical Physics
Effect of a cosmological constant on propagation of vacuum polarized photons in stationary spacetimes
Department of Physics, Institute for Theoretical and Computational Physics, University of Crete, 700 13, Heraklion, Greece
* e-mail: souravbhatta@physics.uoc.gr
Received:
18
May
2015
Accepted:
24
May
2015
Published online:
3
June
2015
Consideration of vacuum polarization in quantum electrodynamics may affect the momentum dispersion relation for photons for a non-trivial background, due to the appearance of curvature dependent terms in the effective action. We investigate the effect of a positive cosmological constant 
on this at one-loop order for stationary -vacuum spacetimes. To the best of our knowledge, so far it only has been shown that affects the propagation in a time dependent black hole spacetime. Here we consider the static de Sitter cosmic string and the Kerr–de Sitter spacetime to show that there might occur a non-vanishing effect due to for physical polarizations. The consistency of these results with the polarization sum rule is discussed.
© The Author(s), 2015
