У оквиру семинара Групе за гравитацију, честице и поља Института за физику у Београду, у петак, 24. новембра 2023. године у 11 часова, на Институту за физику, у сали 360, Душан Ђорђевић (Физички факултет, Универзитет у Београду) одржаће предавање:
Boundary terms and branes in the first-order gravity
САЖЕТАК:
The story of boundary terms in a gravity action dates back to the seventies, yet there are still important questions that need to be fully understood. In this talk, we will revisit the role of the Gibbons-Hawking York boundary term in the Einstein-Hilbert gravity, with a clear motivation to address the issue of bottom up AdS/BCFT duality in a case where bulk geometry is Riemann-Cartan. We will comment on different approaches to GHY-like boundary terms in this scenario and then use our knowledge to understand the issue of end-of-the-world branes with (traditional) Neumann boundary conditions in the first-order gravity, which is a necessary step to address the AdS/BCFT duality adequately. Our analysis will be based on a simple set of gravity theories in different dimensions. Apart from this, we will also touch upon the issue of black hole thermodynamics.