Inflationary Cosmology

Volume 738 of the series Lecture Notes in Physics pp 393-424

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

  • Robert H. BrandenbergerAffiliated withDepartment of Physics, McGill University

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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.