Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/03/017
Keywords
modified gravity; cosmological parameters from CMBR; cosmological perturbation theory; dark energy theory
Funding
- NSF [PHY-1068541, PHY-0968820]
- STFC Consolidated Grant [ST/J000426/1]
- Science and Technology Facilities Council [ST/J000426/1] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [1068541, 0968820] Funding Source: National Science Foundation
- STFC [ST/J000426/1] Funding Source: UKRI
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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 C A M B in mind. Bene fits 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.
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