PIRSA:12050074 Conference Cosmology

DOI10.48660/12050074

Conference/School: Conformal Nature of the Universe - 2012

Magueijo, J. (2012). Is Nothing Sacred? The Cosmological Pay Off from Breaking Lorentz and Diffeormorphism Invariance. Perimeter Institute. https://pirsa.org/12050074

Magueijo, Joao. Is Nothing Sacred? The Cosmological Pay Off from Breaking Lorentz and Diffeormorphism Invariance. Perimeter Institute, May. 11, 2012, https://pirsa.org/12050074 

@misc{ pirsa_PIRSA:12050074,
  doi = {10.48660/12050074},
  url = {https://pirsa.org/12050074},
  author = {Magueijo, Joao},
  keywords = {Cosmology},
  language = {en},
  title = {Is Nothing Sacred? The Cosmological Pay Off from Breaking Lorentz and Diffeormorphism Invariance},
  publisher = {Perimeter Institute},
  year = {2012},
  month = {may},
  note = {PIRSA:12050074 see, \url{https://pirsa.org}}
}

Abstract

I show how the local Lorentz and/or diffeomorphism invariances may be broken by a varying c, softly or harshly, depending on taste. Regardless of the fundamental implications of such dramas, these  symmetry breakings may be of great practical use in cosmology. They may solve the horizon and flatness problems. A near scale-invariant spectrum of fluctuation may arise, even without inflation. Distinct imprints may be left, teaching us an important lesson: our foundations may be flimsier than we like to think.

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