PIRSA:22020064

Null Surface Thermodynamics

Sheikh-Jabbari, M.M. (2022). Null Surface Thermodynamics. Perimeter Institute. https://pirsa.org/22020064

Sheikh-Jabbari, Mohammad M. Null Surface Thermodynamics. Perimeter Institute, Feb. 17, 2022, https://pirsa.org/22020064 

          @misc{ pirsa_PIRSA:22020064,
            doi = {10.48660/22020064},
            url = {https://pirsa.org/22020064},
            author = {Sheikh-Jabbari, Mohammad M},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Null Surface Thermodynamics},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {feb},
            note = {PIRSA:22020064 see, \url{https://pirsa.org}}
          }

Mohammad M Sheikh-Jabbari Institute for Research in Fundamental Sciences (IPM)

DOI 10.48660/22020064
Collection
Talk Type Scientific Series
Subject

Abstract

We study D dimensional pure Einstein gravity theory in a region of spacetime bounded by a generic null boundary. We show besides the graviton modes propagating in the bulk, the system is described by boundary degrees of freedom labeled by D surface charges associated with nontrivial diffeomorphisms at the boundary. We establish that the system admits a natural thermodynamical description. Using standard surface charge analysis and covariant phase space method, we formulate  laws of null surface thermodynamics which are local equations over an arbitrary null surface. This thermodynamical system is generally an open system and can be closed only when there is no flux of gravitons through the null surface. Our analysis  extends the usual black hole thermodynamics to a universal feature of any area element on a generic null surface in a generic diffeomorphism invariant theory of gravity. 

Zoom Link: https://pitp.zoom.us/j/91590041045?pwd=UXpWY3JEd0QwK2hXanBzSkdPRC94UT09