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SUMMARY:Horizon flux-balance laws in the multiscale perturbation
DTSTART:20261014T090000Z
DTEND:20261014T101500Z
DTSTAMP:20261021T145400Z
UID:indico-event-17505@indico.math.cnrs.fr
CONTACT:cecile@ihes.fr
DESCRIPTION:Speakers: Ali Seraj (Institute for Research in Fundamental Sci
 ences (IPM)\, Tehran)\n\nSéminaire Amplitudes et Gravitation sur l'Yvette
  (IHES/IPhT)\nI study the evolution of the event horizon in a “two-times
 cale” perturbative expansion around a stationary black hole. This leads 
 to strong constraints on the “coarse-grained” horizon dynamics. At lea
 ding order\, the horizon exhibits an “adiabatic rigidity”: the leading
  corrections to its angular velocity and inaffinity remain uniform on each
  horizon cut\, while evolving on the slow timescale. We then provide a sys
 tematic procedure for transforming a perturbative bulk solution\, given fo
 r example in Lorenz gauge\, to an ingoing Newman--Unti gauge adapted to th
 e horizon\, allowing the perturbed horizon geometry to be extracted direct
 ly from the metric. Finally\, we formulate “horizon conservation laws”
  associated with horizon symmetries\, including energy\, dynamical entropy
 \, and angular momentum. We expand the charges through second order and th
 eir fluxes through third order in perturbation theory\, providing a framew
 ork for future applications to horizon absorption and backreaction in extr
 eme mass-ratio inspirals.\n \nPour être informé des prochains séminair
 es vous pouvez vous abonner à la liste de diffusion en écrivant un mail 
 à sympa@listes.math.cnrs.fr avec comme sujet: "subscribe seminaire_physiq
 ue PRENOM NOM"(indiquez vos propres prénom et nom) et laissez le corps du
  message vide.\n\nhttps://indico.math.cnrs.fr/event/17505/
LOCATION:Amphithéâtre Léon Motchane (IHES)
URL:https://indico.math.cnrs.fr/event/17505/
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