Seminario del Departamento de Física Teórica "Anomaly-induced effective action of gravity and some important applications" .- Miércoles 5 de febrero

Última modificación: 05/02/2020 - 09:28

Miércoles, Febrero 5, 2020

El Seminario lo impartirá Ilya L. Shapiro de UFJF de la Universidad de Federal de Juiz de Fora. Tendrá lugar en el Seminario de Física Teórica a las 12:10 h el miércoles 5 de febrero.
Abstract:
The effective action of gravity is supposed to contain the main information about quantum corrections to gravity. However, in many cases, it can not be calculated exactly. A remarkable and important exception is the effective action of a vacuum for massless and conformal-invariant matter fields. In this case, effective action can be easily derived by integrating trace anomaly. The integration constant is an unknown conformal functional of the background metric, but for zero-order cosmology this functional is irrelevant and the solution becomes exact. Until recently the integrated anomaly was known only in dimensions d=2 and d=4, but recently we achieved the explicit result for d=6, which confirms the universal functional structure of the effective action. The most important applications in d=4 include systematic classification of vacuum states in the vicinity of the black hole and the Starobinsky model of inflation. In the seminar, I will give a non-technical introduction to the subject and also discuss our recent works on the transition from stable to unstable (Starobinsky model) branches of anomaly-induced inflation.
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Disculpen las molestias pero hay un cambio en el título y abstract del seminario.