Orateur
Sebastián Franchino-Viñas
Description
The presence of strong, background fields can induce instabilities in a quantum field theory, with important implications, for example, in the description of the early universe. Whether these background fields are electromagnetic or gravitational, understanding their effects requires the development and use of nonperturbative techniques. Recent results in this direction, employing conformal transformations of the metric, resummed effective actions and heat kernels, will be presented. Based on arxiv.org/2602.18578.