Publication : t98/161

Au bout de la corde... la théorie M

Vanhove P. (Centre de Physique Thorique (CPhT), CNRS, Ecole Polytechnique, F-91128 Palaiseau, France)
Abstract:
This PhD dissertation contains an account of my works on the non-perturbative structure of the superstring theory. Firstly, I introduce the solitonic p-brane solutions of the supergravity theories. These solutions represented by extended objects of dimension p are generalization of the 't Hooft-Polyakov instantonic solutions to theories with gravitation. Then, the NS1-brane, the solution charged under the Neveu-Schwarz 2-form, corresponding to the superstring is considered as a fundamental object. The connection between these solutions and the non-perturbatives solutions of Dp-branes is exposed. Static and dynamical configurations of D-branes are analyzed in order to understand the structure of the non-perturbative string theory. These results are then applied to study of the non-perturbative correspond between the type~I and SO(32) heterotic string theory, and the self-duality under the Sl(2,Z) group of the type~IIb string. Are deduced precise rules for the instantonic computations are deduce, and a regularization of the ultraviolet divergences of the four gravitons one-loop amplitude computed in the framework of the eleven dimensional supergravity. Which confirms its rle in the framework of M-theory. A direct computation space-time instantonic contributions for these superstrings theories is done in the new framework of the matrix string theory.
Année de publication : 2001
Publication extérieure au service
Thse
Soutenance de thse : Ecole polytechnique, Palaiseau, France ; 1998-04-17 / 1998-04-17
Lien : http://pastel.paristech.or http://theses-en-ligne.in2p3.fr/documents/archives0/00/00/11/96/
Keywords : Supercordes, supersymtrie, phnomnes non perturbatifs, interactions fondamentales, unification
Numéro Exterieur
Langue : Anglais
Editeurs : Bachas C.

 

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