Conceptual Problems of Inflationary Cosmology and a New Approach to Cosmological Structure Formation

Details Conceptual Problems of Inflationary Cosmology and a New Approach to Cosmological Structure Formation Conceptual Problems of Inflationary Cosmology and a New Approach to Cosmological Structure Formation

2007-01-11

arxiv.org/abs/hep-th/0701111v1

Lect.NotesPhys.738:393-424,2008

Physics

High Energy Physics

High Energy Physics - Theory

33 pages, 4 figures Based on an invited talk at "Inflation + 25", Paris, June 2006 To be published in the proceedings (Springe

Scientific paper

10.1007/978-3-540-74353-8_11

In spite of its great phenomenological success, current models of scalar field-driven inflation suffer from important unresolved conceptual issues. New fundamental physics will be required to address these questions. String theory is a candidate for a unified quantum theory of all four forces of nature. As will be shown, string theory may lead to a cosmological background quite different from an inflationary cosmology, and may admit a new stringy mechanism for the origin of a roughly scale-invariant spectrum of cosmological fluctuations.

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