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Title: An effective description of dark matter and dark energy in the mildly non-linear regime

Abstract

In the next few years, we are going to probe the low-redshift universe with unprecedented accuracy. Among the various fruits that this will bear, it will greatly improve our knowledge of the dynamics of dark energy, though for this there is a strong theoretical preference for a cosmological constant. We assume that dark energy is described by the so-called Effective Field Theory of Dark Energy, which assumes that dark energy is the Goldstone boson of time translations. Such a formalism makes it easy to ensure that our signatures are consistent with well-established principles of physics. Since most of the information resides at high wavenumbers, it is important to be able to make predictions at the highest wavenumber that is possible. The Effective Field Theory of Large-Scale Structure (EFTofLSS) is a theoretical framework that has allowed us to make accurate predictions in the mildly non-linear regime. In this paper, we derive the non-linear equations that extend the EFTofLSS to include the effect of dark energy both on the matter fields and on the biased tracers. For the specific case of clustering quintessence, we then perturbatively solve to cubic order the resulting non-linear equations and construct the one-loop power spectrum of themore » total density contrast.« less

Authors:
;  [1];  [2]
  1. Stanford Institute for Theoretical Physics, Stanford University, Stanford, CA 94306 (United States)
  2. School of Physics, Institute for Research in Fundamental Sciences (IPM), P. Code. 19538-33511, Tehran (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22676204
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2017; Journal Issue: 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGICAL CONSTANT; DENSITY; EQUATIONS; FIELD THEORIES; FORECASTING; GOLDSTONE BOSONS; NONLINEAR PROBLEMS; NONLUMINOUS MATTER; RED SHIFT; SIMULATION; SPECTRA; UNIVERSE

Citation Formats

Lewandowski, Matthew, Senatore, Leonardo, and Maleknejad, Azadeh. An effective description of dark matter and dark energy in the mildly non-linear regime. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/05/038.
Lewandowski, Matthew, Senatore, Leonardo, & Maleknejad, Azadeh. An effective description of dark matter and dark energy in the mildly non-linear regime. United States. doi:10.1088/1475-7516/2017/05/038.
Lewandowski, Matthew, Senatore, Leonardo, and Maleknejad, Azadeh. Mon . "An effective description of dark matter and dark energy in the mildly non-linear regime". United States. doi:10.1088/1475-7516/2017/05/038.
@article{osti_22676204,
title = {An effective description of dark matter and dark energy in the mildly non-linear regime},
author = {Lewandowski, Matthew and Senatore, Leonardo and Maleknejad, Azadeh},
abstractNote = {In the next few years, we are going to probe the low-redshift universe with unprecedented accuracy. Among the various fruits that this will bear, it will greatly improve our knowledge of the dynamics of dark energy, though for this there is a strong theoretical preference for a cosmological constant. We assume that dark energy is described by the so-called Effective Field Theory of Dark Energy, which assumes that dark energy is the Goldstone boson of time translations. Such a formalism makes it easy to ensure that our signatures are consistent with well-established principles of physics. Since most of the information resides at high wavenumbers, it is important to be able to make predictions at the highest wavenumber that is possible. The Effective Field Theory of Large-Scale Structure (EFTofLSS) is a theoretical framework that has allowed us to make accurate predictions in the mildly non-linear regime. In this paper, we derive the non-linear equations that extend the EFTofLSS to include the effect of dark energy both on the matter fields and on the biased tracers. For the specific case of clustering quintessence, we then perturbatively solve to cubic order the resulting non-linear equations and construct the one-loop power spectrum of the total density contrast.},
doi = {10.1088/1475-7516/2017/05/038},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 05,
volume = 2017,
place = {United States},
year = {2017},
month = {5}
}