A photon propagator on de Sitter in covariant gauges
Silvije Domazet, Tomislav Prokopec
TL;DR
This paper constructs a de Sitter invariant photon propagator in covariant gauges, generalizing previous work and demonstrating its suitability for perturbative calculations in de Sitter space.
Contribution
It provides a new, covariant gauge photon propagator on de Sitter space that reproduces known physical responses and is useful for quantum field theory calculations.
Findings
Reproduces the response to a static charge
Matches the one-loop electromagnetic stress-energy tensor
Generalizes the Allen-Jacobson propagator in Feynman gauge
Abstract
We construct a de Sitter invariant photon propagator in general covariant gauges. Our result is a natural generalization of the Allen-Jacobson photon propagator in Feynman gauge. Our propagator reproduces the correct response to a point static charge and the one-loop electromagnetic stress-energy tensor, strongly suggesting that it is suitable for perturbative calculations on de Sitter.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Quantum Electrodynamics and Casimir Effect