Analyse semi-classique des phénomènes de résonance et d'absorption par des trous noirs

Bernard Raffaelli 1
1 Equipe de Physique Théorique
SPE - Sciences pour l'environnement
Abstract : Beyond the mathematical definition of a black hole as a solution of Einstein equations in vacuum, there are some observational clues, as pointed out by Kip Thorne, from the first observation of the binary system Cygnus X1 to recent assumptions related to the presence of hypothetical supermassive black holes in the center of various galaxies, concerning their existence in our Universe and consequently encouraging their study. In physics, it is well-known that in order to obtain information on interactions between fundamental particles, atoms, molecules, etc..., and on the structure of composite objects, we have to make collision experiments or, more precisely, scattering experiments. This is precisely the aim of this work. Indeed, studying how a black hole can interact with its environment, we should obtain fundamental information about those "invisible objects". This work is also useful to understand the kind of signals one could detect by the future gravitational waves astronomy devices. This thesis is mainly focused on resonance and absorption phenomena by black holes. The originality of this study is about the use of a semiclassical method known as the "complex angular momentum theory", which brings concepts like S matrix, Regge poles techniques, into high energy black hole physics as suggested implicitly by Chandrasekhar in the middle of the seventies. This approach allows us to have simple and quite intuitive physical interpretations of resonance and absorption phenomena related to the scattering of a scalar, massive or not, field by black holes.
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Bernard Raffaelli. Analyse semi-classique des phénomènes de résonance et d'absorption par des trous noirs. Physique des Hautes Energies - Théorie [hep-th]. Université Pascal Paoli, 2011. Français. ⟨tel-00653074⟩

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