PIRSA:07050042

Dark Energy, Lorentz Violation and Ghosts

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}}
          }

Raman Sundrum

University of Maryland, College Park

Talk number
PIRSA:07050042
Collection
Talk Type
Subject
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.