Finn Larsen on "DeSitter Space and Eternity"

by All (CERN)

Monday 22 Oct 2007, 14:00 → 15:00 Europe/Zurich

1/1-025 (CERN)

The schedule for this Journal Club on String Theory will be as follows: 1) The latest news in the world of strings Please bring papers that caught your recent attention and briefly summarize motivations, methods and results. 2) DeSitter Space and Eternity Finn Larsen will lead a discussion on "DeSitter Space and Eternity". Abstract: Polyakov's paper explores infrared quantum effects in the de Sitter space. The notion of "eternal manifolds" is introduced and it is shown that in most cases the de Sitter space doesn't belong to this class. It is unstable under small perturbations which may cause a breakdown of the de Sitter symmetry. The de Sitter string sigma model is discussed. It is argued that the gauge theory at the complex coupling is dual to the matrix elements of vertex operators in the de Sitter space, taken between the Bunch - Davies vacuum and the "out" state without particles. Hope to see you all, Gabriele Honecker Fernando Marchesano Nikolaos Prezas Ricardo Schiappa Reference: "De Sitter Space and Eternity" Authors: A. M. Polyakov arXiv:0709.2899 [hep-th]