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SUMMARY:Quantum scattering on curved spacetimes - Michał Wrochna (Grenobl
 e)
DTSTART:20170206T150000Z
DTEND:20170206T160000Z
UID:TALK68501@talks.cam.ac.uk
CONTACT:Prof. Mihalis Dafermos
DESCRIPTION:In the construction of quantum Klein-Gordon fields on a curved
  spacetime\, the crucial step is the choice of a particle interpretation\,
  i.e. a splitting of the solutions into positive and negative frequency pa
 rts. In the presence of asymptotic symmetries or spacetime horizons\, the 
 geometry dictates canonical particle interpretations which may however dif
 fer at past and future infinity\, resulting thus in particle creation. In 
 this talk I will give an overview of how asymptotic and microlocal analysi
 s have been used recently to give a meaningful description of such scatter
 ing phenomena and how can the Hawking effect be described rigorously on so
 -called spacetimes with bifurcate Killing horizons. Finally\, I will outli
 ne related conjectures on spacetimes such as Kerr or Kerr-de Sitter.\n(Bas
 ed on joint works with C. Gérard and A. Vasy).
LOCATION:CMS\, MR13
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