LQG Black Holes

          @misc{ scivideos_PIRSA:09010024,
            doi = {10.48660/09010024},
            url = {https://pirsa.org/09010024},
            author = {Modesto, Leonardo},
            keywords = {Quantum Gravity, Quantum Fields and Strings},
            language = {en},
            title = {LQG Black Holes},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {jan},
            note = {PIRSA:09010024 see, \url{https://scivideos.org/pirsa/09010024}}
          }
          

Abstract

In this talk we introduce loop quantum gravity and we apply the theory to the black hole singularity problem. The Schwarzschild black hole solution inside the event horizon coincides with the Kantowski-Sachs space-time and we can study a simple spherically symmetric mini-superspace model. We show the classical black hole singularity is controlled by the quantum theory and the space-time can be dynamically extended beyond the classical singularity. We consider a semiclassical analysis of the black hole in LQG and we focus our attention on the space-time structure. The semiclassical solution is regular everywhere and similar to the Reissner-Nordstrom metric. The LQG black hole metric interpolates between two asymptotically flat regions, the 'r=infinity' region and the 'r=0' region. The metric is self-dual in the sense it is invariant under the symmetry (r ->1/r) which relates small and large distances. We study the thermodynamics of the semiclassical solution.