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Simple implementation of general dark energy models

Bloomfield, Jolyon K.; Pearson, Jonathan A.

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Authors

Jolyon K. Bloomfield

Jonathan A. Pearson



Abstract

We present a formalism for the numerical implementation of general theories of dark energy, combining the computational simplicity of the equation of state for perturbations approach with the generality of the effective field theory approach. An effective fluid description is employed, based on a general action describing single-scalar field models. The formalism is developed from first principles, and constructed keeping the goal of a simple implementation into CAMB in mind. Benefits of this approach include its straightforward implementation, the generality of the underlying theory, the fact that the evolved variables are physical quantities, and that model-independent phenomenological descriptions may be straightforwardly investigated. We hope this formulation will provide a powerful tool for the comparison of theoretical models of dark energy with observational data.

Citation

Bloomfield, J. K., & Pearson, J. A. (2014). Simple implementation of general dark energy models. Journal of Cosmology and Astroparticle Physics, 2014, Article 17. https://doi.org/10.1088/1475-7516/2014/03/017

Journal Article Type Article
Publication Date 2014-03
Deposit Date Feb 26, 2014
Publicly Available Date Mar 19, 2014
Journal Journal of Cosmology and Astroparticle Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 2014
Article Number 17
DOI https://doi.org/10.1088/1475-7516/2014/03/017

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.




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