String Theory In Curved Space Times

Author: N Sánchez
Publisher: World Scientific
ISBN: 9814545007
Size: 26.58 MB
Format: PDF, ePub, Mobi
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String Theory In Curved Space Times from the Author: N Sánchez. The main goal and impact of modern string theory is to provide a consistent quantum theory of gravity. This book provides an updated collection of original new developments and fundamental research in string theory in connection with gravity and physics at the Planck energy scale. Topics treated in this volume by pioneering researchers in the field include: classical and quantum string dynamics in strong gravitational fields, space-time singularities, black holes and cosmological backgrounds; particle and string scattering at the Planck energy scale; string cosmology and its observational consequences; the new features of multistrings and of quantum particle transmutation for strings in curved spacetimes. The book deals with (i) the several new methods developed to solve the highly nonlinear string dynamics in curved spactimes: approximative perturbative methods, asymptotic expansions, exact local expansions and exact global (over the whole world sheet) string solitonic solutions, (ii) the string energy momentum tensor and the equation of state for the string matter, the stretching of the string size in spacetimes with event horizons and near spacetime singularities, (iii) the canonical and semiclassical quantization of strings in curved spacetimes and the physical effects found for: the mass spectrum, structure of levels, scattering amplitudes, number operator and particle transmutation. Contents:String Theory in Cosmological Spacetimes (H J de Vega & N Sánchez)Evolution of a String Network in Backgrounds with Rolling Horizons (M Gasperini, M Giovannini, K A Meissner & G Veneziano)Particle Transmutation and Fermion Number Violation from the Scattering of Strings and Superstrings in Curved Spacetimes (H J de Vega, M Ramón Medrano & N Sánchez)Particle and String Scattering at the Planck Scale (C O Lousto & N Sánchez)Strings in Curved Spacetimes: The Null String Approach (H J de Vega & A Nicolaidis)Strings and Multi-Strings in Black Hole and Cosmological Spacetimes (A L Larsen & N Sánchez)Integrable Field Theories (C Destri & H J de Vega)Von Neumann and Shannon-Wehrl Entropy for Squeezed States and Cosmological Particle Production (M Gasperini & M Giovannini)Preheating and Reheating in Inflationary Cosmology: A Pedagogical Review (D Boyanovsky, H J de Vega, R Holman & J F J Salgado)Circular Strings and Multi-Strings in de Sitter and Anti de Sitter Spacetimes (H J de Vega, A L Larsen & N Sánchez)The Two-Dimensional Stringy Black Hole: A New Approach and a New Effect (H J de Vega, J Ramírez Mittelbrun, M Ramón Medrano & N Sánchez)Relic Gravitons from the Pre-Big Bang: What We Know and What We Do Not Know (M Gasperini)Classical Splitting of Fundamental Strings (H J de Vega, J Ramírez Mittelbrun, M Ramón Medrano & N Sánchez)Cosmic Strings and Black Holes (A L Larsen)Strings Next To and Inside Black Holes (H J de Vega & I L Egusquiza)String Dynamics in Cosmological and Black Hole Backgrounds: The Null String Expansion (C O Lousto & N Sánchez)The Black Hole: Scatterer, Absorber and Emitter of Particles (N Sánchez)Une Approche du Temps et des Fréquences. Vers le Mètre et la Seconde (S Débarbat & M Granveaud) Readership: Researchers in string theory, cosmology and particle physics. Keywords:String;Superstring;Inflation;Cosmology;Black Hole

Theory Of Gravitational Interactions

Author: Maurizio Gasperini
Publisher: Springer
ISBN: 3319496824
Size: 58.12 MB
Format: PDF, Kindle
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Theory Of Gravitational Interactions from the Author: Maurizio Gasperini. This is the second edition of a well-received book that is a modern, self-contained introduction to the theory of gravitational interactions. The new edition includes more details on gravitational waves of cosmological origin, the so-called brane world scenario, and gravitational time-delay effects.The first part of the book follows the traditional presentation of general relativity as a geometric theory of the macroscopic gravitational field, while the second, more advanced part discusses the deep analogies (and differences) between a geometric theory of gravity and the gauge theories of the other fundamental interactions. This fills a gap within the traditional approach to general relativity which usually leaves students puzzled about the role of gravity. The required notions of differential geometry are reduced to the minimum, allowing room for aspects of gravitational physics of current phenomenological and theoretical interest, such as the properties of gravitational waves, the gravitational interactions of spinors, and the supersymmetric and higher-dimensional generalization of the Einstein equations. This textbook is primarily intended for students pursuing a theoretical or astroparticle curriculum but is also relevant for PhD students and young researchers.

Eine Kurze Geschichte Der Zeit

Author: Stephen Hawking
Publisher: Rowohlt Verlag GmbH
ISBN: 3644008612
Size: 18.60 MB
Format: PDF, Kindle
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Eine Kurze Geschichte Der Zeit from the Author: Stephen Hawking. Ist das Universum unendlich oder begrenzt? Hat die Raumzeit einen Anfang, den Urknall? Dehnt sie sich aus? Wird sie wieder in sich zusammenstürzen? Liefe die Zeit dann rückwärts? Welchen Platz im Universum nehmen wir ein? Und ist in den atemberaubenden Modellen der Kosmologen noch Platz für einen Gott? – Es sind existenzielle Fragen, mit denen sich Stephen Hawking befasst, Fragen, die Forschung und Lehre in den Zentren der modernen Physik ebenso bestimmen wie die Diskussion von Geisteswissenschaftlern. Dieses Meisterwerk eines Jahrhundert-Genies hat unsere Weltsicht verändert. Zugleich hat Stephen Hawking damit neue Maßstäbe für die Erklärung komplexer physikalischer Zusammenhänge gesetzt. In diesem Buch, weltweit inzwischen über zehn Millionen Mal verkauft, ist das Credo des großen Physikers enthalten und lebendig. «Der Physiker Stephen Hawking ist im Begriff, die Formel zu finden, die das Universum erklärt.» ZEIT-Magazin