Parametrized post-Friedmannian framework for interacting dark energy theories

Skordis, C.; Pourtsidou, A.; Copeland, Edmund J.

Abstract

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.

• Journal Article Type: Article
• Publication Date: Apr 15, 2015
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 91
• Issue: 8
• Article Number: 083537
• APA6 Citation: Skordis, C., Pourtsidou, A., & Copeland, E. J. (2015). Parametrized post-Friedmannian framework for interacting dark energy theories. Physical Review D, 91(8), https://doi.org/10.1103/PhysRevD.91.083537
• DOI: https://doi.org/10.1103/PhysRevD.91.083537
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.083537
• Copyright Statement: Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf