BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:A Nonlinear Endpoint of Charged Horizon Instabilities - Zach Gelle
 s (Princeton University)
DTSTART:20260320T130000Z
DTEND:20260320T140000Z
UID:TALK244678@talks.cam.ac.uk
CONTACT:Lorenzo Gavassino
DESCRIPTION:Extremal black holes are known to develop a horizon instabilit
 y in the presence of scalar matter. In this talk\, I will discuss how this
  picture extends to charged perturbations\, where the nonlinearities of bo
 th Maxwell’s equations and Einstein’s equations lead to qualitatively 
 new behavior. In particular\, I will give numerical evidence that dynamica
 l extremal black holes act as universal threshold solutions of the Einstei
 n-Maxwell-scalar field system. These threshold solutions can be understood
  from the perspective of critical phenomena\, with horizon instabilities e
 merging in the appropriate limit. I will then present numerical results on
  the existence of arbitrarily large curvatures in the (near-)extremal inte
 rior. This curvature may be visible from future null infinity in spacetime
 s without a black hole region. Based on arXiv:2602.11256.
LOCATION:Potter Room / Zoom :  https://cam-ac-uk.zoom.us/j/85131795570
END:VEVENT
END:VCALENDAR