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Title: Evaluating dark energy probes using multidimensional dark energy parameters

Abstract

We investigate the value of future dark-energy experiments by modeling their ability to constrain the dark-energy equation of state. Similar work was recently reported by the Dark Energy Task Force (DETF) using a two dimensional parameterization of the equation-of-state evolution. We examine constraints in a nine-dimensional dark-energy parameterization, and find that the best experiments constrain significantly more than two dimensions in our 9D space. Consequently the impact of these experiments is substantially beyond that revealed in the DETF analysis, and the estimated cost per 'impact' drops by about a factor of 10 as one moves to the very best experiments. The DETF conclusions about the relative value of different techniques and of the importance of combining techniques are unchanged by our analysis.

Authors:
;  [1];  [2]
  1. Department of Physics, University of California at Davis, One Shields Avenue, Davis, California 95616 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20935246
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 10; Other Information: DOI: 10.1103/PhysRevD.75.103003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; EQUATIONS OF STATE; EVOLUTION; NONLUMINOUS MATTER; SIMULATION; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Albrecht, Andreas, Bernstein, Gary, and Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104. Evaluating dark energy probes using multidimensional dark energy parameters. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.103003.
Albrecht, Andreas, Bernstein, Gary, & Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104. Evaluating dark energy probes using multidimensional dark energy parameters. United States. doi:10.1103/PHYSREVD.75.103003.
Albrecht, Andreas, Bernstein, Gary, and Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104. Tue . "Evaluating dark energy probes using multidimensional dark energy parameters". United States. doi:10.1103/PHYSREVD.75.103003.
@article{osti_20935246,
title = {Evaluating dark energy probes using multidimensional dark energy parameters},
author = {Albrecht, Andreas and Bernstein, Gary and Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104},
abstractNote = {We investigate the value of future dark-energy experiments by modeling their ability to constrain the dark-energy equation of state. Similar work was recently reported by the Dark Energy Task Force (DETF) using a two dimensional parameterization of the equation-of-state evolution. We examine constraints in a nine-dimensional dark-energy parameterization, and find that the best experiments constrain significantly more than two dimensions in our 9D space. Consequently the impact of these experiments is substantially beyond that revealed in the DETF analysis, and the estimated cost per 'impact' drops by about a factor of 10 as one moves to the very best experiments. The DETF conclusions about the relative value of different techniques and of the importance of combining techniques are unchanged by our analysis.},
doi = {10.1103/PHYSREVD.75.103003},
journal = {Physical Review. D, Particles Fields},
number = 10,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}
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