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SUMMARY:Quasinormal Modes Decode Kasner Scaling inside Black Holes
DTSTART;VALUE=DATE-TIME:20261109T010000Z
DTEND;VALUE=DATE-TIME:20261109T013000Z
DTSTAMP;VALUE=DATE-TIME:20261023T133144Z
UID:indico-contribution-2987@indico.itp.ac.cn
DESCRIPTION:Speakers: Zi-Qing Xiao (ICTP-AP)\nCan the geometry hidden behi
 nd a black hole's event horizon be reconstructed from its exterior quasino
 rmal-mode spectrum? In this talk\, I will explore how high-overtone quasin
 ormal modes encode information about black hole interiors. We show that di
 stinct power-law corrections to the spectrum\, obtained through angular-mo
 mentum and scalar-mass responses\, allow the temporal and angular Kasner e
 xponents to be extracted separately\, without imposing the Kasner constrai
 nts. Using analytic monodromy methods and numerical calculations\, we demo
 nstrate this reconstruction in asymptotically flat black holes. In particu
 lar\, we establish a four-dimensional Schwarzschild benchmark\, where the 
 predicted scaling behavior is confirmed numerically\, and show that gravit
 ational perturbations exhibit the same singularity-sensitive asymptotic st
 ructure. We further investigate dilatonic black holes\, demonstrating that
  the reconstructed exponents track changes in the interior geometry. Compl
 ementary higher-dimensional and asymptotically AdS examples provide additi
 onal tests of the underlying mechanism. Our results establish a quantitati
 ve connection between exterior quasinormal-mode spectra and black hole int
 erior geometry\, opening a theoretical route toward probing otherwise inac
 cessible regions of spacetime.\n\nhttps://indico.itp.ac.cn/event/417/contr
 ibutions/2987/
LOCATION:
URL:https://indico.itp.ac.cn/event/417/contributions/2987/
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