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.

Citation

Skordis, C., Pourtsidou, A., & Copeland, E. J. (2015). Parametrized post-Friedmannian framework for interacting dark energy theories. Physical Review D, 91(8), Article 083537. https://doi.org/10.1103/PhysRevD.91.083537

• Journal Article Type: Article
• Acceptance Date: Mar 13, 2015
• Online Publication Date: Apr 24, 2015
• Publication Date: Apr 15, 2015
• Deposit Date: Apr 26, 2017
• Publicly Available Date: Apr 26, 2017
• 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
• DOI: https://doi.org/10.1103/PhysRevD.91.083537
• Public URL: https://nottingham-repository.worktribe.com/output/749081
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.083537