String cosmology and the landscape

Publication date: Available online 29 April 2017 Source:Comptes Rendus Physique Author(s): Iosif Bena, Mariana Graña String Theory is believed to have a landscape of 10500 vacua with properties that resemble those of our Universe. The existence of these vacua can be combined with anthropic reasoning to explain some of the hardest problems in cosmology and high-energy physics: the cosmological constant problem, the hierarchy problem, and the un-natural almost-flatness of the inflationary potential. We will explain the construction of these vacua, focusing on the challenges of obtaining vacua with a positive cosmological constant.

Source: Comptes Rendus Physique - April 29, 2017 Category: Physics Source Type: research