PIRSA:19110127

Video URL

https://pirsa.org/19110127

Weak Cosmic Censorship in Einstein-Scalar theory in flat 4D

Ganchev, B. (2019). Weak Cosmic Censorship in Einstein-Scalar theory in flat 4D. Perimeter Institute for Theoretical Physics. https://pirsa.org/19110127

Ganchev, Bogdan. Weak Cosmic Censorship in Einstein-Scalar theory in flat 4D. Perimeter Institute for Theoretical Physics, Nov. 21, 2019, https://pirsa.org/19110127 

          @misc{ scivideos_PIRSA:19110127,
            doi = {10.48660/19110127},
            url = {https://pirsa.org/19110127},
            author = {Ganchev, Bogdan},
            keywords = {Strong Gravity},
            language = {en},
            title = {Weak Cosmic Censorship in Einstein-Scalar theory in flat 4D},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2019},
            month = {nov},
            note = {PIRSA:19110127 see, \url{https://scivideos.org/pirsa/19110127}}
          }

Bogdan Ganchev University of Cambridge

Talk numberPIRSA:19110127
DOI10.48660/19110127
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

We present a plausible counterexample to the weak cosmic censorship conjecture in four-dimensional Einstein-Scalar theory with asymptotically flat boundary conditions. Our setup stems from the analysis of the massive Klein-Gordon equation on a fixed Kerr black hole background. In particular, we construct the quasinormal spectrum numerically, and analytically in the WKB approximation, then go on to compute its backreation on the Kerr geometry. In the regime of parameters where the analytic and numerical techniques overlap we find perfect agreement. We give strong evidence for the existence of a nonlinear instability at late times.