Parametrized post-Friedmannian framework for interacting dark energy theories

Constantinos Skordis, Alkistis Pourtsidou, E. J. Copeland

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We present the most general parametrization of models of dark energy in the form of a scalar field which is explicitly coupled to dark matter. We follow and extend the parametrized post-Friedmannian approach, previously applied to modified gravity theories, in order to include interacting dark energy. We demonstrate its use through a number of worked examples and show how the initially large parameter space of free functions can be significantly reduced and constrained to include only a few nonzero coefficients. This paves the way for a model-independent approach to classify and test interacting dark energy theories.
Original languageEnglish
Pages (from-to)083537-1 - 083537-11
JournalPhysical Review D
Issue number8
Publication statusPublished - 24 Apr 2015


  • RCUK
  • STFC
  • ST/L0003934/1 and ST/H002774/1


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