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SUMMARY:Uniqueness of extremal black holes in de Sitter - Dávid Katona\, 
 The University of Edinburgh
DTSTART:20240426T120000Z
DTEND:20240426T130000Z
UID:TALK216277@talks.cam.ac.uk
CONTACT:Xi Tong
DESCRIPTION:Uniqueness theorems for black holes with a cosmological consta
 nt are only known in a few limited cases. In my talk I present a recent un
 iqueness theorem for the extremal Schwarzschild-de Sitter black hole withi
 n the class of analytic vacuum spacetimes with a positive cosmological con
 stant containing a static extremal Killing horizon. The proof is based on 
 establishing the uniqueness of transverse deformations to the near-horizon
  geometry at each order in the transverse parameter. I also present a gene
 ralisation to charged extremal black holes in de Sitter and discuss the an
 alogous problem in the case of negative cosmological constant. The talk is
  based on 2309.04238 [gr-qc] and 2403.08467 [gr-qc].
LOCATION:Potter room/Zoom
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