Astrophysics · arXiv:astro-ph/0401407 v1 · submitted 20 Jan 2004
Post-Inflationary Curvature Perturbations
The paper says
“The characteristic feature of postinflationary perturbations is non-Gaussianity ∼ ± 1.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
Curvature perturbations generated after the end of inflation are estimated for a generic multi-field inflationary potential. The curvature perturbations are generated by conversion of inflationary isocurvature perturbations, similar to curvaton and inhomogeneous reheating scenarios. During inflation, the trajectory along which the fields are rolling down will fluctuate. When inflation ends, the fields enter the oscillatory phase along different directions in different parts of the universe. Different oscillatory trajectories can have different effective equations of state and reheating rates, so that different parts of the universe will evolve differently. This translates the isocurvature perturbations into the curvature perturbations. If all light fields make similar contributions to the potential energy, the postinflationary curvature perturbations are much smaller than the standard inflationary curvature perturbations. But if different light fields make very different contributions to the potential energy, the postinflationary curvature perturbations can exceed the inflationary perturbations. The characteristic feature of postinflationary perturbations is non-Gaussianity ∼ ± 1.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 1.00
What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.43 · human participants 0.01 · controlled comparison 0.19 · randomized assignment 0.01 · states quantitative result 0.83 · compares with prior results 0.80 · mentions code or data availability 0.02
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v1). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| Curvature perturbations generated after the end of inflation are estimated for a generic multi-field inflationary potential. | contribution 0.99 | 0.81 | 0.10 | asserted 0.95 |
| The curvature perturbations are generated by conversion of inflationary isocurvature perturbations, similar to curvaton and inhomogeneous reheating scenarios. | background 0.53 | 0.24 | 0.09 | asserted 1.00 |
| During inflation, the trajectory along which the fields are rolling down will fluctuate. | background 0.72 | 0.17 | 0.03 | asserted 1.00 |
| When inflation ends, the fields enter the oscillatory phase along different directions in different parts of the universe. | method 0.44 | 0.27 | 0.03 | asserted 1.00 |
| Different oscillatory trajectories can have different effective equations of state and reheating rates, so that different parts of the universe will evolve differently. | interpretation 0.59 | 0.39 | 0.07 | asserted 0.73 |
| This translates the isocurvature perturbations into the curvature perturbations. | interpretation 0.58 | 0.39 | 0.13 | asserted 1.00 |
| If all light fields make similar contributions to the potential energy, the postinflationary curvature perturbations are much smaller than the standard inflationary curvature perturbations. | result 0.99 | 0.66 | 0.14 | asserted 0.97 |
| But if different light fields make very different contributions to the potential energy, the postinflationary curvature perturbations can exceed the inflationary perturbations. | result 0.98 | 0.61 | 0.26 | hedged possibility 0.98 |
| The characteristic feature of postinflationary perturbations is non-Gaussianity $\sim \pm 1$. | result 0.97 | 0.69 | 0.31 | asserted 1.00 |
What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 0.70
What was examined, and what was not
Sources read
- arXiv listing abstract v1
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- references and citing sentences
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- P abstract
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- S sections
- T body sentences
- C citations
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How the labels were made
Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,803 input tokens.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 1 Pith paper
Reviewed papers on Pith that cite this one. The full citation record
- Elastic Inflation astro-ph · Apr 2004
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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There are various mechanisms that can produce (correlated) isocurvature and adiabatic perturbations, see, e.g., Refs. [ref] .
Constraints on neutrino density and velocity isocurvature modes from WMAP-9 data · Mechanisms that may produce neutrino isocurvature · 0.99
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