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Scalar Field Cosmology
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Book Synopsis Scalar Field Cosmology by : Chervon Sergei
Download or read book Scalar Field Cosmology written by Chervon Sergei and published by World Scientific. This book was released on 2019-04-29 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph discusses cosmological inflation and provides exact and slow roll solutions. It also reviews new and advanced approaches of exact solutions construction with canonical scalar fields, including application of generating functions methods, the superpotential and many others. This book presents the reduction of the Friedmann equation to the Abel equation, which is a very useful tool in cosmology. It offers new solutions and discusses its properties.Additionally, it touches upon the role of phantom scalar field cosmology and analyzes phantonical models. It describes brane cosmology with scalar fields, providing exact solutions construction using the superpotential method as well as Darboux transformations.This book provides detailed calculations throughout.
Book Synopsis Phi in the Sky by : C.J.A.P. Martins
Download or read book Phi in the Sky written by C.J.A.P. Martins and published by American Institute of Physics. This book was released on 2004-11-19 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle physicists have been looking for scalar fields for a long time: the Higgs field, for example, is crucial in the standard particle physics model but it has not been found so far. Similarly, cosmologists have become interested in scalar fields recently and a few tantalizing hints have surfaced in the past few years which could be viewed as direct or indirect evidence for the presence of scalar fields. This workshop discussed the motivation for the existence of scalar fields in nature, assessed their consequences and identified key distinguishing characteristics that might provide strong interests in the coming years. Examples include the evidence for inflation in the early universe, the recent claim of detection of variations of the fine-structure constant (and also the electron-to-proton mass ratio) and the possible detection of a cosmic string through its graviational effect.
Book Synopsis Energy Conditions and Scalar Field Cosmology by : Shawn Westmoreland
Download or read book Energy Conditions and Scalar Field Cosmology written by Shawn Westmoreland and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report, we discuss the four standard energy conditions of General Relativity (null, weak, dominant, and strong) and investigate their cosmological consequences. We note that these energy conditions can be compatible with cosmic acceleration provided that a repulsive cosmological constant exists and the acceleration stays within certain bounds. Scalar fields and dark energy, and their relationships to the energy conditions, are also discussed. Special attention is paid to the 1988 Ratra-Peebles scalar field model, which is notable in that it provides a physical self-consistent framework for the phenomenology of dark energy. Appendix B, which is part of joint-research with Anatoly Pavlov, Khaled Saaidi, and Bharat Ratra, reports on the existence of the Ratra-Peebles scalar field tracker solution in a curvature-dominated universe, and discusses the problem of investigating the evolution of long-wavelength inhomogeneities in this solution while taking into account the gravitational back-reaction (in the linear perturbative approximation).
Book Synopsis Exact Solutions and Scalar Fields in Gravity by : Alfredo Macías
Download or read book Exact Solutions and Scalar Fields in Gravity written by Alfredo Macías and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Divided into four parts, this book covers recent developments in topics pertaining to gravity theories, including discussions on the presence of scalar fields. Part One is devoted to exact solutions in general relativity, and is mainly concerned with the results of rotating null dust beams and fluids. Also included is a panoramic vision of new research directions in this area, which would require revising certain theorems and their possible extensions within gravity theories, new aspects concerning the Ernst potentials, double Kerr spacetimes, and rotating configurations. In particular, there is a detailed discussion of totally symmetric and totally geodesic spaces, in which a method for generating (2+1)-dimensional solutions from (3+1)-dimensional solutions is given. Part Two deals with alternative theories of gravity, all of which include scalar fields and gauge fields. Here, quantum and cosmological effects, which arise from both gravity theories in four and higher dimensions and from metric-affine theories, are investigated. Part Three is devoted to cosmological and inflationary scenarios. Local effects, such as the influence of scalar fields in protogalactic interactions, numerical studies of the collapse of molecular cores, as well as the inverse inflationary problem and the blue eigenvalue spectrum of it, are considered. Moreover, the role of scalar fields as dark matter and quantum cosmology in the Bergman-Wagoner and Gowdy theories, together with the relation of the conformal symmetry and deflationary gas universe, are likewise presented. The last part of the book includes some mixed topics which are still in the experimental stage. Among them are the foundation of the Maxwell theory, a discussion on electromagnetic Thirring problems, a note on the staticity of black holes with non-minimally coupled scalar fields, and a study of the Lorentz force free charged fluids in general relativity. Thus, this book is the most up-to-date, comprehensive collection of papers on the subject of exact solutions and scalar fields in gravity and is a valuable tool for researchers in the area.
Book Synopsis Cosmology in Scalar-Tensor Gravity by : Valerio Faraoni
Download or read book Cosmology in Scalar-Tensor Gravity written by Valerio Faraoni and published by Springer Science & Business Media. This book was released on 2004-03-31 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmology in Scalar-Tensor Gravity covers all aspects of cosmology in scalar-tensor theories of gravity. Considerable progress has been made in this exciting area of physics and this book is the first to provide a critical overview of the research. Among the topics treated are: -Scalar-tensor gravity and its limit to general relativity, -Effective energy-momentum tensors and conformal frames, -Gravitational waves in scalar-tensor cosmology, -Specific scalar-tensor theories, -Exact cosmological solutions and cosmological perturbations, -Scalar-tensor scenarios of the early universe and inflation, -Scalar-tensor models of quintessence in the present universe and their far-reaching consequences for the ultimate fate of the cosmos.
Book Synopsis Cosmology in Scalar-Tensor Gravity by : Valerio Faraoni
Download or read book Cosmology in Scalar-Tensor Gravity written by Valerio Faraoni and published by Springer Science & Business Media. This book was released on 2004-04-30 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmology in Scalar-Tensor Gravity covers all aspects of cosmology in scalar-tensor theories of gravity. Considerable progress has been made in this exciting area of physics and this book is the first to provide a critical overview of the research. Among the topics treated are: -Scalar-tensor gravity and its limit to general relativity, -Effective energy-momentum tensors and conformal frames, -Gravitational waves in scalar-tensor cosmology, -Specific scalar-tensor theories, -Exact cosmological solutions and cosmological perturbations, -Scalar-tensor scenarios of the early universe and inflation, -Scalar-tensor models of quintessence in the present universe and their far-reaching consequences for the ultimate fate of the cosmos.
Book Synopsis Scalar Fields in Cosmology by : Jens Kujat
Download or read book Scalar Fields in Cosmology written by Jens Kujat and published by . This book was released on 2006 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In this work we show just how common and widespread the use of scalar fields has become in modern cosmology, and we explain the underlying mechanisms for a variety of different topics. First, we examine the effect of a possible time variation in the Higgs vacuum expectation value on the Cosmic Microwave Background and determine how observational data can constrain such a time variation. Next, we turn our attention to the analysis of scalar field quintessence models in an attempt to determine how to improve our ability to distinguish between different models, which make similar predictions. As a final topic, we examine scalar field phantom models in the context of their ability to ameliorate the cosmological coincidence problem.
Book Synopsis Scalar Fields in Numerical General Relativity by : Katy Clough
Download or read book Scalar Fields in Numerical General Relativity written by Katy Clough and published by Springer. This book was released on 2018-06-16 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the use of numerical relativity (NR) methods to solve cosmological problems, and describes one of the first uses of NR to study inflationary physics. NR consists in the solution of Einstein’s Equation of general relativity, which governs the evolution of matter and energy on cosmological scales, and in systems where there are strong gravitational effects, such as around black holes. To date, NR has mainly been used for simulating binary black hole and neutron star mergers like those detected recently by LIGO. Its use as a tool in fundamental problems of gravity and cosmology is novel, but rapidly gaining interest. In this thesis, the author investigates the initial condition problem in early universe cosmology – whether an inflationary expansion period could have “got going” from initially inhomogeneous conditions – and identifies criteria for predicting the robustness of particular models. State-of-the-art numerical relativity tools are developed in order to address this question, which are now publicly available.
Book Synopsis Primordial Cosmology by : Patrick Peter
Download or read book Primordial Cosmology written by Patrick Peter and published by Oxford University Press. This book was released on 2013-02-14 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an extensive survey of all the physics necessary to understand the current developments in the field of fundamental cosmology, as well as an overview of the observational data and methods. It will help students to get into research by providing definitions and main techniques and ideas discussed today. The book is divided into three parts. Part 1 summarises the fundamentals in theoretical physics needed in cosmology (general relativity, field theory, particle physics). Part 2 describes the standard model of cosmology and includes cosmological solutions of Einstein equations, the hot big bang model, cosmological perturbation theory, cosmic microwave background anisotropies, lensing and evidence for dark matter, and inflation. Part 3 describes extensions of this model and opens up current research in the field: scalar-tensor theories, supersymmetry, the cosmological constant problem and acceleration of the universe, topology of the universe, grand unification and baryogenesis, topological defects and phase transitions, string inspired cosmology including branes and the latest developments. The book provides details of all derivations and leads the student up to the level of research articles.
Book Synopsis Cosmology in Gauge Field Theory and String Theory by : D. Bailin
Download or read book Cosmology in Gauge Field Theory and String Theory written by D. Bailin and published by CRC Press. This book was released on 2021-09-29 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cosmology in Gauge Field Theory and String Theory focuses on the cosmological implications of the gauge theories of particle physics and of string theory. The book first examines the universe's series of phase transitions in which the successive gauge symmetries of the higher-temperature phase were spontaneously broken after the big bang, discussing relics of these phase transitions, more generic relics (baryons, neutrinos, axions), and supersymmetric particles (neutralinos and gravitinos). The author next studies supersymmetric theory, supergravity theory, and the constraints on the underlying field theory of the universe's inflationary era. The book concludes with a discussion of black hole solutions of the supergravity theory that approximates string theory at low energies and the insight that string theory affords into the microscopic origin of the Bekenstein-Hawking entropy. Cosmology in Gauge Field Theory and String Theory provides a modern introduction to these important problems from a particle physicist's perspective. It is intended as an introductory textbook for a first course on the subject at a graduate level.
Book Synopsis Fundamental and Emergent Scalar Fields in Cosmology by : Sam Cormack
Download or read book Fundamental and Emergent Scalar Fields in Cosmology written by Sam Cormack and published by . This book was released on 2017 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scalar fields play an important role in modeling cosmological phenomena. They are used in models of inflation, dark matter and dark energy. We present three cosmological models involving scalar fields: a reheating model, a cyclic universe, and a model of superfluid dark matter. Our model of reheating has an axion-like inflaton coupled to gravitational waves by a Chern-Simons term. Oscillation of the inflaton at the end of inflation causes oscillation of gravitational waves which in turn drive parametric amplification of matter. Our cyclic universe gives an explanation of why the coupling constants in our universe take the values they do. The cycle of expansion, contraction and bounces is driven by an unusual scalar field with negative kinetic energy, known as a ghost field. This ghost field also sets the values of the coupling constants which change from cycle to cycle. Finally, we construct a model of superfluid fermionic dark matter. The scalar field here is not fundamental, rather, it is generated by the Bardeen-Cooper-Schrieffer condensation of Cooper pairs of fermions. We consider what effects this condensate may have on dark matter halos.
Book Synopsis An Introduction on Cosmology & Inflation with Scalar Field by : Rajib Karmaker
Download or read book An Introduction on Cosmology & Inflation with Scalar Field written by Rajib Karmaker and published by . This book was released on 2018-09-28 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cosmological Inflation and Large-Scale Structure by : Andrew R. Liddle
Download or read book Cosmological Inflation and Large-Scale Structure written by Andrew R. Liddle and published by Cambridge University Press. This book was released on 2000-04-13 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough and up-to-date graduate textbook on the most promising theory of the universe - inflationary cosmology.
Book Synopsis Dynamical Systems and Cosmology by : A.A. Coley
Download or read book Dynamical Systems and Cosmology written by A.A. Coley and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamical systems theory is especially well-suited for determining the possible asymptotic states (at both early and late times) of cosmological models, particularly when the governing equations are a finite system of autonomous ordinary differential equations. In this book we discuss cosmological models as dynamical systems, with particular emphasis on applications in the early Universe. We point out the important role of self-similar models. We review the asymptotic properties of spatially homogeneous perfect fluid models in general relativity. We then discuss results concerning scalar field models with an exponential potential (both with and without barotropic matter). Finally, we discuss the dynamical properties of cosmological models derived from the string effective action. This book is a valuable source for all graduate students and professional astronomers who are interested in modern developments in cosmology.
Book Synopsis Modern Topics in Scalar Field Cosmology by : Cari Powell
Download or read book Modern Topics in Scalar Field Cosmology written by Cari Powell and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cosmological Physics by : J. A. Peacock
Download or read book Cosmological Physics written by J. A. Peacock and published by Cambridge University Press. This book was released on 1998-12-28 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides advanced undergraduate and graduate students with a complete introduction to modern cosmology. It successfully bridges the gap between undergraduate and advanced graduate texts by discussing topics of current research, starting from first principles. Throughout this authoritative volume, emphasis is given to the simplest, most intuitive explanation for key equations used by researchers. The first third of the book carefully develops the necessary background in general relativity and quantum fields. The rest of the book then provides self-contained accounts of all the key topics in contemporary cosmology, including inflation, topological defects, gravitational lensing, galaxy formation, large-scale structure and the distance scale. To aid understanding, the book is well illustrated with helpful figures and includes outline solutions to nearly 100 problems. All necessary astronomical jargon is clearly explained, ensuring the book is self-contained for any student with undergraduate physics.
Book Synopsis Bayesian Reasoning In Data Analysis: A Critical Introduction by : Giulio D'agostini
Download or read book Bayesian Reasoning In Data Analysis: A Critical Introduction written by Giulio D'agostini and published by World Scientific. This book was released on 2003-06-13 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a multi-level introduction to Bayesian reasoning (as opposed to “conventional statistics”) and its applications to data analysis. The basic ideas of this “new” approach to the quantification of uncertainty are presented using examples from research and everyday life. Applications covered include: parametric inference; combination of results; treatment of uncertainty due to systematic errors and background; comparison of hypotheses; unfolding of experimental distributions; upper/lower bounds in frontier-type measurements. Approximate methods for routine use are derived and are shown often to coincide — under well-defined assumptions! — with “standard” methods, which can therefore be seen as special cases of the more general Bayesian methods. In dealing with uncertainty in measurements, modern metrological ideas are utilized, including the ISO classification of uncertainty into type A and type B. These are shown to fit well into the Bayesian framework.
