Ten Theses on Black Hole Entropy


Sorkin, R. (2009). Ten Theses on Black Hole Entropy. Perimeter Institute. https://pirsa.org/09010023


Sorkin, Rafael. Ten Theses on Black Hole Entropy. Perimeter Institute, Jan. 23, 2009, https://pirsa.org/09010023


          @misc{ pirsa_PIRSA:09010023,
            doi = {10.48660/09010023},
            url = {https://pirsa.org/09010023},
            author = {Sorkin, Rafael},
            keywords = {Quantum Gravity, Quantum Fields and Strings},
            language = {en},
            title = {Ten Theses on Black Hole Entropy},
            publisher = {Perimeter Institute},
            year = {2009},
            month = {jan},
            note = {PIRSA:09010023 see, \url{https://pirsa.org}}

Rafael Sorkin Perimeter Institute for Theoretical Physics


I present a viewpoint on black hole thermodynamics according to which the entropy: derives from horizon 'degrees of freedom''; is finite because the deep structure of spacetime is discrete; is ``objective'' thanks to the distinguished coarse graining provided by the horizon; and obeys the second law of thermodynamics precisely because the effective dynamics of the exterior region is not unitary.