Speaker
Dr
Drazen Glavan
(University of Warsaw)
Description
Photons are conformally coupled to gravity and therefore do not get produced due to cosmological expansion, while gravitons are not and do get produced a lot due to the expansion. Since gravitons
couple universally to all matter fields they can induce sizeable effects for conformally coupled fields through loop corrections. I will present computations in two different gauges for the one-loop graviton corrections to photon vacuum polarization in de Sitter spacetime. This is used to quantum correct Maxwell equations, and I will present two cases, (i) correction to dynamical photons, and (ii) correction to the Coulomb force between two point charges. The corrections in both cases exhibit secular growth. Gauge dependence will be discussed.
| Overview or Regular Talk? | Regular: 45 min. |
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Author
Dr
Drazen Glavan
(University of Warsaw)
