One loop graviton corrections to dynamical photons in de Sitter

Understand

We employ a recent, general gauge computation of the one loop graviton contribution to the vacuum polarization on de Sitter to solve for one loop corrections to the photon mode function.

• The vacuum polarization takes the form of a gauge independent, spin 2 contribution and a gauge dependent, spin 0 contribution.
• We show that the leading secular corrections derive entirely from the spin 2 contribution.