Ghost condensation and a consistent infrared modification of gravity

@article{ArkaniHamed2003GhostCA,
  title={Ghost condensation and a consistent infrared modification of gravity},
  author={N. Arkani-Hamed and Hsin-Chia Cheng and M. Luty and S. Mukohyama},
  journal={Journal of High Energy Physics},
  year={2003},
  volume={2004},
  pages={074-074}
}
We propose a theoretically consistent modification of gravity in the infrared, which is compatible with all current experimental observations. This is an analog of the Higgs mechanism in general relativity, and can be thought of as arising from ghost condensation — a background where a scalar field has a constant velocity, = M2. The ghost condensate is a new kind of fluid that can fill the universe, which has the same equation of state, ρ = −p, as a cosmological constant, and can hence drive de… Expand

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