Springer Theses

Probing the Early Universe with the CMB Scalar, Vector and Tensor Bispectrum

Authors: Shiraishi, Maresuke

  • Develops a complete formalism for the CMB bispectrum induced by the primordial non-Gaussianities
  • Provides novel constraints on the primordial non-Gaussianities composed of not only scalar but also vector- and tensor-mode fluctuations
  • Analyzes statistical anisotropy and parity violation in the CMB bispectrum
  • Nominated as an outstanding Ph.D thesis by Nagoya University's Physics Department in 2012
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About this book

The non-Gaussianity in the primordial density fluctuations is a key feature to clarify the early Universe and it has been probed with the Cosmic Microwave Background (CMB) bispectrum. In recent years, we have treated the novel-type CMB bispectra, which originate from the vector- and tensor-mode perturbations and include the violation of the rotational or parity invariance. On the basis of our current works, this thesis provides the general formalism for the CMB bispectrum sourced by the non-Gaussianity in the scalar, vector and tensor-mode perturbations. Applying this formalism, we calculate the CMB bispectra from the two scalars and a graviton correlation and primordial magnetic fields, and then outline new constraints on these magnitudes. Furthermore, this formalism can be easily extended to the cases where the rotational or parity invariance is broken. We also compute the CMB bispectra from the scalar-mode non-Gaussianities with a preferred direction and the tensor-mode non-Gaussianities induced by the parity-violating Weyl cubic terms. Here, we show that these bispectra include unique signals, which any symmetry-invariant models can never produce.

About the authors

Dr. Maresuke Shiraishi
Department of Physics
Nagoya University

Table of contents (10 chapters)

  • Introduction

    Shiraishi, Maresuke

    Pages 1-3

  • Fluctuations in Inflation

    Shiraishi, Maresuke

    Pages 5-11

  • Fluctuations in Cosmic Microwave Background Radiation

    Shiraishi, Maresuke

    Pages 13-50

  • Primordial Non-Gaussianities

    Shiraishi, Maresuke

    Pages 51-58

  • General Formalism for the CMB Bispectrum from Primordial Scalar, Vector and Tensor Non-Gaussianities

    Shiraishi, Maresuke

    Pages 59-63

Buy this book

eBook $99.00
price for USA (gross)
  • ISBN 978-4-431-54180-6
  • Digitally watermarked, DRM-free
  • Included format: PDF, EPUB
  • ebooks can be used on all reading devices
  • Immediate eBook download after purchase
Hardcover $129.00
price for USA
  • ISBN 978-4-431-54179-0
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
Softcover $129.00
price for USA
  • ISBN 978-4-431-54716-7
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
Rent the ebook  
  • Rental duration: 1 or 6 month
  • low-cost access
  • online reader with highlighting and note-making option
  • can be used across all devices
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Bibliographic Information

Bibliographic Information
Book Title
Probing the Early Universe with the CMB Scalar, Vector and Tensor Bispectrum
Authors
Series Title
Springer Theses
Copyright
2013
Publisher
Springer Japan
Copyright Holder
Springer Japan
eBook ISBN
978-4-431-54180-6
DOI
10.1007/978-4-431-54180-6
Hardcover ISBN
978-4-431-54179-0
Softcover ISBN
978-4-431-54716-7
Series ISSN
2190-5053
Edition Number
1
Number of Pages
XIII, 180
Topics