Chair: I. Antoniadis
19. The Klein-Gordon-Fock equation in the curved spacetime of the Kerr-Newman (anti) de Sitter black hole
GEORGIOS KRANIOTIS (UNIVERSITY OF IOANNINA)
Exact solutions of the Klein-Gordon-Fock (KGF) general relativistic equation that describe the dynamics of a massive, electrically charged scalar particle in the curved spacetime geometry of a charged, rotating Kerr-Newman-(anti) de Sitter black hole are investigated. In the general case of a rotating, charged, cosmological black hole the solution of the KGF equation with the method of...
Francisco Pedro (IFT, UAM-CSIC)
In this talk I will discuss how Brownian motion can be used to probe the nature of inflation in the string landscape. I will use the methods of time dependent random matrix theory to show that the sequence of events that constitutes our Universe’s history is exponentially unlikely in this framework. I will discuss the implications of these results for both inflation and the string landscape.
Michael Hewitt Hewitt (Canterbury Christ Church University)
A simple model of the quantum mechanics of a nucleating particle in the recently proposed string condensation mechanism is presented. This is based on a universal mechanical gauge field related to the string condensate, which behaves as a kind of fluid. String condensation is conjectured to prevent the formation of closed horizons in situations of extreme compression and thereby enable...
Wieland Staessens (IFT, UAM-CSIC)
Compactifications of Type II String Theory are characterised by an abundance of stringy axions, whose properties provide models for cosmology (large field inflation) and solutions to the strong CP problem. Consistent geometric settings with D-branes induce various mixing effects which clutter the low energy effective theory for the axions. In this talk, we relate this effective theory to...
Clemens Wieck (IFT, UAM-CSIC)
We study possible string theory compactifications which, in the low-energy limit, describe chaotic inflation with a stabilizer field. On the one hand, we analyze a recent proposal in type IIA string theory involving D6-branes. After integrating out the relevant closed-string moduli consistently, tachyonic directions arise during inflation which cannot be lifted. This is ultimately due to the...