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hep-th2026
One loop photon-graviton mixing in an electromagnetic field: Part 3
Naser Ahmadiniaz, Fiorenzo Bastianelli, Felix Karbstein und Christian Schubert
Photon-graviton conversion in an electromagnetic field is a well-known prediction of Einstein-Maxwell theory. First discussed at tree-level by Gertsenshtein in 1962, more recently…
hep-th2024
Complex effective actions and gravitational pair creation
E. T. Akhmedov, D. V. Diakonov, C. Schubert
We use different methods to calculate the imaginary part of the gravitational effective action due to a massless scalar field, with a view on perturbative vs. non-pertubative and t…