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
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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