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Cosmology Beyond Einstein

  • Book
  • © 2017

Overview

Authors:
  1. Adam Ross Solomon

    1. Center for Particle Cosmology, University of Pennsylvania, Philadelphia, USA

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  • Nominated as an outstanding PhD thesis by the University of Cambridge, UK
  • An exceptionally clear presentation of one of physics' major frontiers
  • Investigates modified gravity from both theoretical and observational perspectives
  • Includes supplementary material: sn.pub/extras

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (9 chapters)

  1. Front Matter

    Pages i-xxi
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  2. Introduction

    • Adam Ross Solomon
    Pages 1-20

  3. Gravity Beyond General Relativity

    • Adam Ross Solomon
    Pages 21-51

  4. A Massive Graviton

    1. Front Matter

      Pages 53-53
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    2. Cosmological Stability of Massive Bigravity

      • Adam Ross Solomon
      Pages 55-70

    3. Linear Structure Growth in Massive Bigravity

      • Adam Ross Solomon
      Pages 71-101

    4. The Geometry of Doubly-Coupled Bigravity

      • Adam Ross Solomon
      Pages 103-115

    5. Cosmological Implications of Doubly-Coupled Massive Bigravity

      • Adam Ross Solomon
      Pages 117-134

    6. Cosmological Implications of Doubly-Coupled Massive Gravity

      • Adam Ross Solomon
      Pages 135-151

  5. Lorentz Violation

    1. Front Matter

      Pages 153-153
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    2. Lorentz Violation During Inflation

      • Adam Ross Solomon
      Pages 155-195

    3. Discussion and Conclusions

      • Adam Ross Solomon
      Pages 197-206

  6. Back Matter

    Pages 207-231
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Keywords

About this book

This work investigates the theoretical and cosmological implications of modifying Einstein's theory of general relativity. It explores two classes of modifications to gravity: those in which the graviton is given a small mass, and those in which Lorentz invariance is spontaneously broken. It elucidates the nature of cosmological perturbations in theories of massive bimetric gravity, including a potentially deadly instability. Theories of gravity beyond general relativity could explain why the expansion of the Universe is accelerating, obviating the need for a dark energy, and can also affect the evolution of the early Universe. Next, it investigates the nature of spacetime in massive gravity theories that contain two different spacetime metrics. Lastly, the strongest constraints to date are placed on the size of Lorentz-violating effects in the gravity sector during inflation.
 

Authors and Affiliations

  • Center for Particle Cosmology, University of Pennsylvania, Philadelphia, USA

    Adam Ross Solomon

About the author

Adam Solomon is a theoretical cosmologist interested in how we can unveil the fundamental laws of physics by looking to the sky. While his research has spanned a variety of cosmological observations and fundamental theories, he has focused especially on the mystery of the accelerating expansion of the Universe, and whether this may be a sign of new gravitational physics beyond Einstein's general relativity.


He is currently a postdoctoral fellow at the Center for Particle Cosmology at the University of Pennsylvania, having obtained his bachelors at Yale University and his doctorate at the University of Cambridge.


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