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SUMMARY:Quasinormal modes of small black holes
DTSTART:20211126T141500
DTSTAMP:20260427T203143Z
UID:c8f789185e01c2c15d0717f02f8ec54a092bfa90308e4f97fe153d22
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Peter HINTZ - ETH Zürich\nAbstract:\n\nI will discuss t
 he quasinormal mode (QNM) spectrum of black holes in de Sitter space when 
 their mass tends to zero. The main result establishes the convergence\, in
  compact subsets of the complex plane\, to the QNM spectrum of de Sitter s
 pace (the limiting spacetime). Upon rescaling\, this gives a precise descr
 iption of QNMs of unit size black holes in de Sitter space with very small
  positive cosmological constant (as in our own universe). The proof is bas
 ed on a priori estimates for a degenerating family of ODEs which capture t
 he singular manner in which the black hole ‘disappears’ in the zero ma
 ss limit. Numerics illustrate the results and suggest some directions of f
 uture research. Joint work with YuQing Xie (MIT).\n\n 
LOCATION:https://epfl.zoom.us/j/62837479339?pwd=M29NZmwvL2lvQ2FNR2lyZ2Vxam
 orUT09
STATUS:CONFIRMED
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