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Cosmic acceleration and the challenge of modifying gravity
Cosmology and Nongalactic Astrophysics · Submitted 3 Nov 2010
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or providing an intriguing hint of new infrared physics.
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The abstract, sentence by sentence
I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. Foremost among these are the questions of theoretical consistency - the avoidance of ghosts in particular - and the constraints imposed by precision local tests of gravity within the solar system. For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or providing an intriguing hint of new infrared physics. In the second half of the talk, I discuss a recent approach to extracting cosmology from higher-dimensional induced gravity models.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. | background 0.80 | 0.46 | 0.06 | asserted 0.80 |
| s1 | Foremost among these are the questions of theoretical consistency - the avoidance of ghosts in particular - and the constraints imposed by precision local tests of gravity within the solar system. | background 0.99 | 0.06 | 0.06 | asserted 1.00 |
| s2 | For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or providing an intriguing hint of new infrared physics. | background 0.60 | 0.10 | 0.20 | hedged possibility 0.99 |
| s3 | In the second half of the talk, I discuss a recent approach to extracting cosmology from higher-dimensional induced gravity models. | contribution 0.86 | 0.39 | 0.05 | asserted 0.76 |
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The paper
Original abstract
I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. Foremost among these are the questions of theoretical consistency - the avoidance of ghosts in particular - and the constraints imposed by precision local tests of gravity within the solar system. For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or providing an intriguing hint of new infrared physics. In the second half of the talk, I discuss a recent approach to extracting cosmology from higher-dimensional induced gravity models.
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How the literature uses it
1 arXiv paper cite this in 1 sentence
Papers citing it
Cites it as background 1 paper
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Apart from dark energy models, modified gravity [ref] can also explain the acceleration.
Observational constraints on decaying vacuum dark energy model · Introduction · 0.92
What it cites · 21 sentences without a confident label
Builds on 2 papers
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It is natural to consider generalizing the action of [ref] to include other curvature invariants [ref] .
Is Cosmic Speed-Up Due to New Gravitational Physics? · Extensions: Higher-Order Curvature Invariants · 0.86
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It is natural to consider generalizing the action of [ref] to include other curvature invariants [ref] .
The Cosmology of Generalized Modified Gravity Models · Extensions: Higher-Order Curvature Invariants · 0.86
Cites as background 7 papers
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It may be that curvatures and length scales in the observable universe are only now reaching values at which an infrared modification of gravity can make itself apparent by driving self-acceleration (for reviews see [ref] ).
Dynamics of dark energy · Introduction · 0.95
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It may be that curvatures and length scales in the observable universe are only now reaching values at which an infrared modification of gravity can make itself apparent by driving self-acceleration (for reviews see [ref] ).
Approaches to Understanding Cosmic Acceleration · Introduction · 0.95
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It may be that curvatures and length scales in the observable universe are only now reaching values at which an infrared modification of gravity can make itself apparent by driving self-acceleration (for reviews see [ref] ).
The Physics of Cosmic Acceleration · Introduction · 0.95
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