E-Book Overview
The standard cosmological picture of our Universe emerging from a 'big bang' leaves open many fundamental questions which string theory, a unified theory of all forces of nature, should be able to answer. The first book dedicated to string cosmology, it contains a pedagogical introduction to the basic notions of the subject. It describes the new possible scenarios suggested by string theory for the primordial evolution of our Universe. It discusses the main phenomenological consequences of these scenarios, stresses their differences from each other, and compares them to the more conventional models of inflation. The book summarises over 15 years of research in this field and introduces current advances. It is self-contained, so it can be read by astrophysicists with no knowledge of string theory, and high-energy physicists with little understanding of cosmology. Detailed and explicit derivations of all the results presented provide a deeper appreciation of the subject.
E-Book Content
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ELEMENTS OF STRING COSMOLOGY The standard cosmological picture of our Universe emerging from a “big bang” leaves open many fundamental questions: Is the big bang a true physical singularity? What happens to the Universe at ultra-high energy densities when even gravity should be quantized? Has our cosmological history a finite or infinite past extension? Do we live in more than four space-time dimensions? String theory, a unified theory of all forces of nature, should be able to answer these questions. This book contains a pedagogical introduction to the basic notions of string theory and cosmology. It describes the new possible scenarios suggested by string theory for the primordial evolution of our Universe. It discusses the main phenomenological consequences of these scenarios, stresses their differences from each other, and compares them with the m