PIRSA:07050042 Conference Cosmology

DOI10.48660/07050042

Conference/School: Excursions in the Dark Workshop - 2007

Sundrum, R. (2007). Dark Energy, Lorentz Violation and Ghosts. Perimeter Institute. https://pirsa.org/07050042

Sundrum, Raman. Dark Energy, Lorentz Violation and Ghosts. Perimeter Institute, May. 20, 2007, https://pirsa.org/07050042 

@misc{ pirsa_PIRSA:07050042,
  doi = {10.48660/07050042},
  url = {https://pirsa.org/07050042},
  author = {Sundrum, Raman},
  keywords = {Cosmology},
  language = {en},
  title = {Dark Energy, Lorentz Violation and Ghosts},
  publisher = {Perimeter Institute},
  year = {2007},
  month = {may},
  note = {PIRSA:07050042 see, \url{https://pirsa.org}}
}

Abstract

I describe how vacuum energy can be controlled by a symmetry principle that necessitates a ghost sector. I argue that the implied instability of Minkowski spacetime is natural and consistent with experience if gravity is fundamentally Lorentz-violating, and describe attempts to construct such exotic dynamics. I briefly discuss the more robust experimental/observational signatures of such a scenario.

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