Dilatonic ghost condensate as dark energy

@inproceedings{Piazza2004DilatonicGC,
  title={Dilatonic ghost condensate as dark energy},
  author={Federico Piazza and Shinji Tsujikawa},
  year={2004}
}
We explore a dark energy model with a ghost scalar field in the context of the runaway dilaton scenario in low-energy effective string theory. We address the problem of vacuum stability by implementing higher-order derivative terms and show that a cosmologically viable model of 'phantomized' dark energy can be constructed without violating the stability of quantum fluctuations. We also analytically derive the condition under which cosmological scaling solutions exist, starting from a general… CONTINUE READING

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