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Exploring the Expansion History of the Universe
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Exploring the recent expansion history of the universe promises insights into the cosmological model, the nature of dark energy, and potentially clues to high energy physics theories and gravitation. We examine the extent to which precision distance-redshift observations can map out the history, including the acceleration-deceleration transition, and the components and equations of state of the energy density. We consider the ability to distinguish between various dynamical scalar field models for the dark energy, as well as higher dimension and alternate gravity theories. Finally, we present a new, advantageous parametrization for the study of dark energy.
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Showing 60 of 154 Pith papers that cite this
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Impact of DESI BAO Data on Inflationary Parameters: stability against late-time new physics
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Bridge the Cosmological Tensions with Thawing Gravity
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BAO vs. SN evidence for evolving dark energy
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Upper limits on dark energy-dark matter interaction from DESI DR2 in a field-theoretic analysis
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Assessing observational constraints on dark energy
Quintessence models satisfying NEC everywhere predict the w0 > -1 and w0+wa < -1 sector favored by data, due to an approximate degeneracy in the w(z) = w0 + wa z/(1+z) parameterization.
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Growth, geometry, and early-universe split of the matter density parameter $\Omega_{\rm m}$
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Exploring the interplay of late-time dynamical dark energy and new physics before recombination
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Testing Scale-Dependent Suppression of Structure Growth in the Linear Regime
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Cosmological constraining power of the redshifts, heights, and angular clustering of weak gravitational lensing peaks
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