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SUMMARY:Black tsunamis and naked singularities - Marija Tomasevic (CPHT\, 
 Ecole Polytechnique)
DTSTART:20220617T120000Z
DTEND:20220617T130000Z
UID:TALK173714@talks.cam.ac.uk
CONTACT:Prahar Mitra
DESCRIPTION:We study the evolution of the Gregory-Laflamme instability for
  black strings in global AdS spacetime\, and investigate the CFT dual of t
 he formation of a bulk naked singularity. Using an effective theory in the
  large D limit\, we uncover a rich variety of dynamical behaviour\, depend
 ing on the thickness of the string and on initial perturbations. These inc
 lude: large inflows of horizon generators from the asymptotic boundary (a 
 `black tsunami')\; a pinch-off of the horizon that likely reveals a naked 
 singularity\; and competition between these two behaviours\, such as a nak
 edly singular pinch-off that subsequently gets covered by a black tsunami.
  The holographic dual describes different patterns of heat flow due to the
  Hawking radiation of two black holes placed at the antipodes of a spheric
 al universe. We also present a model that describes\, in any D\, the burst
  in the holographic stress-energy tensor when the signal from a bulk self-
 similar naked singularity reaches the boundary. The model shows that the s
 hear components of the boundary stress diverge in finite time\, while the 
 energy density and pressures from the burst vanish.
LOCATION:Zoom
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