Instability of dark energy with mass-varying neutrinos

  title={Instability of dark energy with mass-varying neutrinos},
  author={N. Afshordi and M. Zaldarriaga and K. Kohri},
  journal={Physical Review D},
An interesting dynamical model for dark energy which does not require extremely light scalar fields such as quintessence, and at the same time explains the (near) coincidence between the neutrino and dark energy densities is the model of dark energy coupled to mass-varying neutrinos (MaVaNs). Despite the attractions of this model, we show that, generically, this model contains a catastrophic instability which occurs when neutrinos become nonrelativistic. As a result of this instability, as… Expand
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