"Spectral Theory and Mathematical Physics"

In honor of Vladimir Georgescu



Cergy-Pontoise, June 21-24, 2016.





Photo Credit: Cergy - Axe majeur, www.cergypontoise.fr/jcms/p2_85721/fr/le-patrimoine-moderne





Program

Spyros Alexakis
Kaïs Ammari
Jean-Marc Bouclet
Jan Derezinski

Clotilde Fermanian Kammerer

Christian Gérard

Sylvain Golénia

Dietrich Häfner

Matti Lassas

Mathieu Lewin

Jacob Schach Moller

Francis Nier

Victor Nistor

Benoit Pausader



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Dietrich Hafner: On classical and quantum scattering for field equations on the (De Sitter) Kerr metric

Abstract: In this talk I will review some results concerning scattering theory for field equations on the (De Sitter) Kerr metric. The (De Sitter) Kerr metric is a solution of the vacuum Einstein equations with zero (positive in the De Sitter case) cosmological constant describing rotating black holes. There is a fundamental difference between Dirac and Klein-Gordon fields. Whereas there exists a positive conserved quantity for Dirac fields, no such quantity exists for Klein-Gordon fields. I will describe asymptotic completeness results for both Dirac and Klein-Gordon fields (Kerr case for Dirac and De Sitter Kerr case for Klein-Gordon). For Klein-Gordon fields the angular momentum of the solution has to be fixed. For Dirac fields I will also discuss a theorem describing the Hawking effect. This effect predicts the creation of particles by black holes. The results presented here were obtained in different collaborations with Vladimir Georgescu, Christian Gérard and Jean-Philippe Nicolas.