Quantum Gravity And Quantum Cosmology

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Quantum Gravity and Quantum Cosmology

Gianluca Calcagni,Lefteris Papantonopoulos,George Siopsis,Nikos Tsamis
Quantum Gravity and Quantum Cosmology Book PDF

Author : Gianluca Calcagni,Lefteris Papantonopoulos,George Siopsis,Nikos Tsamis
Publisher : Springer
Page : 402 pages
File Size : 52,7 Mb
Release : 2012-10-31
Category : Science
ISBN : 9783642330360

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Quantum Gravity and Quantum Cosmology by Gianluca Calcagni,Lefteris Papantonopoulos,George Siopsis,Nikos Tsamis Pdf

Quantum gravity has developed into a fast-growing subject in physics and it is expected that probing the high-energy and high-curvature regimes of gravitating systems will shed some light on how to eventually achieve an ultraviolet complete quantum theory of gravity. Such a theory would provide the much needed information about fundamental problems of classical gravity, such as the initial big-bang singularity, the cosmological constant problem, Planck scale physics and the early-time inflationary evolution of our Universe. While in the first part of this book concepts of quantum gravity are introduced and approached from different angles, the second part discusses these theories in connection with cosmological models and observations, thereby exploring which types of signatures of modern and mathematically rigorous frameworks can be detected by experiments. The third and final part briefly reviews the observational status of dark matter and dark energy, and introduces alternative cosmological models. Edited and authored by leading researchers in the field and cast into the form of a multi-author textbook at postgraduate level, this volume will be of benefit to all postgraduate students and newcomers from neighboring disciplines wishing to find a comprehensive guide for their future research.

Quantum Cosmology

Martin Bojowald
Quantum Cosmology Book PDF

Author : Martin Bojowald
Publisher : Springer Science & Business Media
Page : 306 pages
File Size : 41,9 Mb
Release : 2011-07-15
Category : Science
ISBN : 9781441982759

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Quantum Cosmology by Martin Bojowald Pdf

Consequences of quantum gravity on grander scales are expected to be enormous: only such a theory can show how black holes really behave and where our universe came from. Applications of loop quantum gravity to cosmology have especially by now shed much light on cosmic evolution of a universe in a fundamental, microscopic description. Modern techniques are explained in this book which demonstrate how the universe could have come from a non-singular phase before the big bang, how equations for the evolution of structure can be derived, but also what fundamental limitations remain to our knowledge of the universe before the big bang. The following topics will be covered in this book: Hamiltonian cosmology: a general basic treatment of isotropy, perturbations and their role for observations; useful in general cosmology. Effective equations: an efficient way to evaluate equations of quantum gravity, which is also useful in other areas of physics where quantum theory is involved. Loop quantization: a new formalism for the atomic picture of space-time; usually presented at a sophisticated mathematical level, but evaluated here from an intuitive physical side. The book will start with physical motivations, rather than mathematical developments which is more common in other expositions of this field. All the required mathematical methods will be presented, but will not distract the reader from seeing the underlying physics. Simple but representative models will be presented first to show the basic features, which are then used to work upwards to a general description of quantum gravity and its applications in cosmology. This will make the book accessible to a more general physics readership.

Quantum Gravity, Quantum Cosmology and Lorentzian Geometries

Giampiero Esposito
Quantum Gravity Quantum Cosmology and Lorentzian Geometries Book PDF

Author : Giampiero Esposito
Publisher : Springer Science & Business Media
Page : 364 pages
File Size : 53,8 Mb
Release : 2009-02-13
Category : Science
ISBN : 9783540472957

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Quantum Gravity, Quantum Cosmology and Lorentzian Geometries by Giampiero Esposito Pdf

This book is aimed at theoretical and mathematical physicists and mathematicians interested in modern gravitational physics. I have thus tried to use language familiar to readers working on classical and quantum gravity, paying attention both to difficult calculations and to existence theorems, and discussing in detail the current literature. The first aim of the book is to describe recent work on the problem of boundary conditions in one-loop quantum cosmology. The motivation of this research was to under stand whether supersymmetric theories are one-loop finite in the presence of boundaries, with application to the boundary-value problemsoccurring in quantum cosmology. Indeed, higher-loop calculations in the absence of boundaries are already available in the litera ture, showing that supergravity is not finite. I believe, however, that one-loop calculations in the presence of boundaries are more fundamental, in that they provide a more direct check of the inconsistency of supersymmetric quantum cosmology from the perturbative point of view. It therefore appears that higher-order calculations are not strictly needed, if the one-loop test already yields negative results. Even though the question is not yet settled, this research has led to many interesting, new applications of areas of theoretical and mathematical physics such as twistor theory in flat space, self-adjointness theory, the generalized Riemann zeta-function, and the theory of boundary counterterms in super gravity. I have also compared in detail my work with results by other authors, explaining, whenever possible, the origin of different results, the limits of my work and the unsolved problems.

Gravity, Gauge Theories and Quantum Cosmology

J.V. Narlikar,T. Padmanabhan
Gravity Gauge Theories and Quantum Cosmology Book PDF

Author : J.V. Narlikar,T. Padmanabhan
Publisher : Springer Science & Business Media
Page : 477 pages
File Size : 41,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400945081

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Gravity, Gauge Theories and Quantum Cosmology by J.V. Narlikar,T. Padmanabhan Pdf

For several decades since its inception, Einstein's general theory of relativity stood somewhat aloof from the rest of physics. Paradoxically, the attributes which normally boost a physical theory - namely, its perfection as a theoreti cal framework and the extraordinary intellectual achievement underlying i- prevented the general theory from being assimilated in the mainstream of physics. It was as if theoreticians hesitated to tamper with something that is manifestly so beautiful. Happily, two developments in the 1970s have narrowed the gap. In 1974 Stephen Hawking arrived at the remarkable result that black holes radiate after all. And in the second half of the decade, particle physicists discovered that the only scenario for applying their grand unified theories was offered by the very early phase in the history of the Big Bang universe. In both cases, it was necessary to discuss the ideas of quantum field theory in the background of curved spacetime that is basic to general relativity. This is, however, only half the total story. If gravity is to be brought into the general fold of theoretical physics we have to know how to quantize it. To date this has proved a formidable task although most physicists would agree that, as in the case of grand unified theories, quantum gravity will have applications to cosmology, in the very early stages of the Big Bang universe. In fact, the present picture of the Big Bang universe necessarily forces us to think of quantum cosmology.

Classical and Quantum Cosmology

Gianluca Calcagni
Classical and Quantum Cosmology Book PDF

Author : Gianluca Calcagni
Publisher : Springer
Page : 843 pages
File Size : 48,9 Mb
Release : 2017-01-06
Category : Science
ISBN : 9783319411279

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Classical and Quantum Cosmology by Gianluca Calcagni Pdf

This comprehensive textbook is devoted to classical and quantum cosmology, with particular emphasis on modern approaches to quantum gravity and string theory and on their observational imprint. It covers major challenges in theoretical physics such as the big bang and the cosmological constant problem. An extensive review of standard cosmology, the cosmic microwave background, inflation and dark energy sets the scene for the phenomenological application of all the main quantum-gravity and string-theory models of cosmology. Born of the author's teaching experience and commitment to bridging the gap between cosmologists and theoreticians working beyond the established laws of particle physics and general relativity, this is a unique text where quantum-gravity approaches and string theory are treated on an equal footing. As well as introducing cosmology to undergraduate and graduate students with its pedagogical presentation and the help of 45 solved exercises, this book, which includes an ambitious bibliography of about 3500 items, will serve as a valuable reference for lecturers and researchers.

Foundations of Space and Time

Jeff Murugan,Amanda Weltman,George F. R. Ellis
Foundations of Space and Time Book PDF

Author : Jeff Murugan,Amanda Weltman,George F. R. Ellis
Publisher : Cambridge University Press
Page : 453 pages
File Size : 50,9 Mb
Release : 2012-07-19
Category : Science
ISBN : 9780521114400

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Foundations of Space and Time by Jeff Murugan,Amanda Weltman,George F. R. Ellis Pdf

Encapsulates the latest debates on this topic, giving researchers and graduate students an up-to-date view of the field.

Canonical Gravity and Applications

Martin Bojowald
Canonical Gravity and Applications Book PDF

Author : Martin Bojowald
Publisher : Cambridge University Press
Page : 313 pages
File Size : 54,7 Mb
Release : 2010-12-23
Category : Science
ISBN : 9781139494137

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Canonical Gravity and Applications by Martin Bojowald Pdf

Canonical methods are a powerful mathematical tool within the field of gravitational research, both theoretical and experimental, and have contributed to a number of recent developments in physics. Providing mathematical foundations as well as physical applications, this is the first systematic explanation of canonical methods in gravity. The book discusses the mathematical and geometrical notions underlying canonical tools, highlighting their applications in all aspects of gravitational research from advanced mathematical foundations to modern applications in cosmology and black hole physics. The main canonical formulations, including the Arnowitt-Deser-Misner (ADM) formalism and Ashtekar variables, are derived and discussed. Ideal for both graduate students and researchers, this book provides a link between standard introductions to general relativity and advanced expositions of black hole physics, theoretical cosmology or quantum gravity.

Loop Quantum Gravity: The First 30 Years

Abhay Ashtekar,Jorge Pullin
Loop Quantum Gravity The First 30 Years Book PDF

Author : Abhay Ashtekar,Jorge Pullin
Publisher : World Scientific
Page : 320 pages
File Size : 45,9 Mb
Release : 2017-03-16
Category : Science
ISBN : 9789813220010

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Loop Quantum Gravity: The First 30 Years by Abhay Ashtekar,Jorge Pullin Pdf

'Written by young theoretical physicists who are experts in the field, this volume is meant both to provide an introduction to the field and to offer a review of the latest developments, not discussed in many other existing books, for senior researchers. It will also appeal to scientists who do not work directly on LQG but are interested in issues at the interface of general relativity and quantum physics.'CERN CourierThis volume presents a snapshot of the state-of-the-art in loop quantum gravity from the perspective of younger leading researchers. It takes the reader from the basics to recent advances, thereby bridging an important gap.The aim is two-fold — to provide a contemporary introduction to the entire field for students and post-docs, and to present an overview of the current status for more senior researchers. The contributions include the latest developments that are not discussed in existing books, particularly recent advances in quantum dynamics both in the Hamiltonian and sum over histories approaches; and applications to cosmology of the early universe and to the quantum aspects of black holes.

A First Course in Loop Quantum Gravity

Rodolfo Gambini,Jorge Pullin
A First Course in Loop Quantum Gravity Book PDF

Author : Rodolfo Gambini,Jorge Pullin
Publisher : Oxford University Press
Page : 192 pages
File Size : 53,6 Mb
Release : 2011-09-22
Category : Science
ISBN : 9780199590759

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A First Course in Loop Quantum Gravity by Rodolfo Gambini,Jorge Pullin Pdf

Loop quantum gravity is one of the modern contenders for a unified description of quantum mechanics and gravity. Up to now no book has covered the material at the level of a college student or of other readers with some knowledge of college level physics. This book fills that gap.

Foundations of Quantum Cosmology

Martin Bojowald
Foundations of Quantum Cosmology Book PDF

Author : Martin Bojowald
Publisher : Unknown
Page : 346 pages
File Size : 54,5 Mb
Release : 2020-09-17
Category : Quantum cosmology
ISBN : 0750324589

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Foundations of Quantum Cosmology by Martin Bojowald Pdf

This is the first book to lay the physical foundations of quantum cosmology, complete with an introduction to space-time physics, quantum theory, and the main approaches to quantum gravity. It is an essential guide for researchers in quantum gravity and astrophysicists interested in fundamental aspects of cosmology.

Towards Quantum Gravity

Jerzy Kowalski-Glikman
Towards Quantum Gravity Book PDF

Author : Jerzy Kowalski-Glikman
Publisher : Springer
Page : 376 pages
File Size : 55,6 Mb
Release : 2008-01-11
Category : Science
ISBN : 9783540466345

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Towards Quantum Gravity by Jerzy Kowalski-Glikman Pdf

The aim of this book is to give graduate students an overview of quantum gravity but it also covers related topics from astrophysics. Some well-written contributions can serve as an introduction into basic conceptual concepts like time in quantum gravity or the emergence of a classical world from quantum cosmology. This makes the volume attractive to philosophers of science, too. Other topics are black holes, gravitational waves and non-commutative extensions of physical theories.

Gravity and the Quantum

Jasjeet Singh Bagla,Sunu Engineer
Gravity and the Quantum Book PDF

Author : Jasjeet Singh Bagla,Sunu Engineer
Publisher : Springer
Page : 494 pages
File Size : 49,6 Mb
Release : 2017-02-23
Category : Science
ISBN : 9783319517001

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Gravity and the Quantum by Jasjeet Singh Bagla,Sunu Engineer Pdf

This book provides a compilation of in-depth articles and reviews on key topics within gravitation, cosmology and related issues. It is a celebratory volume dedicated to Prof. Thanu Padmanabhan ("Paddy"), the renowned relativist and cosmologist from IUCAA, India, on the occasion of his 60th birthday. The authors, many of them leaders of their fields, are all colleagues, collaborators and former students of Paddy, who have worked with him over a research career spanning more than four decades. Paddy is a scientist of diverse interests, who attaches great importance to teaching. With this in mind, the aim of this compilation is to provide an accessible pedagogic introduction to, and overview of, various important topics in cosmology, gravitation and astrophysics. As such it will be an invaluable resource for scientists, graduate students and also advanced undergraduates seeking to broaden their horizons.

Quantum Cosmology

Remo Ruffini
Quantum Cosmology Book PDF

Author : Remo Ruffini
Publisher : World Scientific
Page : 358 pages
File Size : 55,6 Mb
Release : 1987
Category : Science
ISBN : 9971503123

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Quantum Cosmology by Remo Ruffini Pdf

This detailed survey comprises reprints on subjects related to the development of quantum cosmology. As an introduction, an overview is included.

The Universe

Martin Bojowald
The Universe Book PDF

Author : Martin Bojowald
Publisher : John Wiley & Sons
Page : 306 pages
File Size : 48,7 Mb
Release : 2012-11-26
Category : Science
ISBN : 9783527667680

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The Universe by Martin Bojowald Pdf

Written by a well-known author in the field, this book presents a modern understanding of the universe based on relativity, quantum physics and their elusive combination. It introduces the crucial theoretical ingredients in an accessible way, starting from the physics of Newton and developing subsequent theories all the way to the modern enigma of quantum gravity. The intermediate level presentation assumes only a general knowledge of math and physics, adopting a "two-level" approach: equations are retained throughout the chapters but set apart from the main text in boxes to allow for lay readers to understand the book. For scientists, researchers, students and lecturers in cosmology, astronomy, gravitation, quantum and theoretical physics; as well as mathematicians, students, lecturers, academics and non-experts in related fields with an interest in the subject.

The Problem of Time

Edward Anderson
The Problem of Time Book PDF

Author : Edward Anderson
Publisher : Springer
Page : 920 pages
File Size : 51,5 Mb
Release : 2017-09-18
Category : Science
ISBN : 9783319588483

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The Problem of Time by Edward Anderson Pdf

This book is a treatise on time and on background independence in physics. It first considers how time is conceived of in each accepted paradigm of physics: Newtonian, special relativity, quantum mechanics (QM) and general relativity (GR). Substantial differences are moreover uncovered between what is meant by time in QM and in GR. These differences jointly source the Problem of Time: Nine interlinked facets which arise upon attempting concurrent treatment of the QM and GR paradigms, as is required in particular for a background independent theory of quantum gravity. A sizeable proportion of current quantum gravity programs - e.g. geometrodynamical and loop quantum gravity approaches to quantum GR, quantum cosmology, supergravity and M-theory - are background independent in this sense. This book's foundational topic is thus furthermore of practical relevance in the ongoing development of quantum gravity programs. This book shows moreover that eight of the nine facets of the Problem of Time already occur upon entertaining background independence in classical (rather than quantum) physics. By this development, and interpreting shape theory as modelling background independence, this book further establishes background independence as a field of study. Background independent mechanics, as well as minisuperspace (spatially homogeneous) models of GR and perturbations thereabout are used to illustrate these points. As hitherto formulated, the different facets of the Problem of Time greatly interfere with each others' attempted resolutions. This book explains how, none the less, a local resolution of the Problem of Time can be arrived at after various reconceptualizations of the facets and reformulations of their mathematical implementation. Self-contained appendices on mathematical methods for basic and foundational quantum gravity are included. Finally, this book outlines how supergravity is refreshingly different from GR as a realization of background independence, and what background independence entails at the topological level and beyond.