S-matrix constraints on de Sitter and on black holes

Abstract: We discuss how the S-matrix formulation of quantum gravity/string theory excludes any sort of stable or a metastable de Sitter. The constraint is enforced by the phenomenon of quantum break-time. This has a number of observable consequences both for early and late cosmology. In particular, it excludes cosmological constant as part of the energy budget in the Universe. We confront the quantum portraits of de Sitter and black holes and point out similarities as well as fundamental differences.

general relativity and quantum cosmologyHEP - phenomenologyHEP - theorymathematical physics

Audience: researchers in the topic

CCTP HEP Seminars

Series comments: Description: Seminars in high energy physics

Weekly HEP Seminars in the broad spectrum of High Energy Physics at University of Crete.

Recordings of past seminars can be found at conference.physics.uoc.gr/b/hep-kzk-2ad