General Relativity and Quantum Cosmology · arXiv:2302.12512 v1 · submitted 24 Feb 2023
Cosmological consequences of a scalar field with oscillating equation of state. IV. Primordial nucleosynthesis and the deuterium problem
The paper says
“We show that the model can survive the BBN constraints.”
from the abstract · picked out as the main claim by a classifier
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Abstract
We study the primordial nucleosynthesis (BBN) in the stepwise scalar field model proposed by Tián [arXiv:1912.13208, Phys. Rev. D 101, 063531 (2020)], which provides a multiaccelerating Universe solution to the cosmological coincidence problem and predicts that the scalar field may be non-negligible even in the early Universe. The observed abundances of the light elements can be used to constrain the energy density of the scalar field during the BBN era. We present a public \textttMatlab code to implement the BBN calculation in the stepwise scalar field model. We show that the model can survive the BBN constraints. In particular, this model incorporates a new solution to the possible deuterium problem: very early dark energy that appears at the end of BBN. In addition, the BBN constraints, along with constraints from the cosmic late-time acceleration, suggest that the Universe in the radiation era evolves in a chaotic accelerating manner, rather than an oscillating scaling manner.
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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 0.04 · states limitation 0.15 · human participants 0.01 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.07 · compares with prior results 0.32 · mentions code or data availability 0.97
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 |
|---|---|---|---|---|
| We study the primordial nucleosynthesis (BBN) in the stepwise scalar field model proposed by Ti\'an [arXiv:1912.13208, Phys. Rev. D 101, 063531 (2020)], which provides a multiaccelerating Universe solution to the cosmological coincidence problem and predicts that the scalar field may be non-negligible even in the early Universe. | contribution 0.59 | 0.34 | 0.06 | asserted 0.69 |
| The observed abundances of the light elements can be used to constrain the energy density of the scalar field during the BBN era. | background 0.74 | 0.11 | 0.06 | asserted 0.76 |
| We present a public \texttt{Matlab} code to implement the BBN calculation in the stepwise scalar field model. | contribution 0.59 | 0.95 | 0.03 | asserted 0.99 |
| We show that the model can survive the BBN constraints. | result 1.00 | 0.92 | 0.36 | asserted 1.00 |
| In particular, this model incorporates a new solution to the possible deuterium problem: very early dark energy that appears at the end of BBN. | result 0.77 | 0.77 | 0.27 | asserted 0.98 |
| In addition, the BBN constraints, along with constraints from the cosmic late-time acceleration, suggest that the Universe in the radiation era evolves in a chaotic accelerating manner, rather than an oscillating scaling manner. | interpretation 0.51 | 0.81 | 0.36 | hedged possibility 0.98 |
What kind of paper the classifier reports this is: theoretical result 0.48 · evidence from simulation or computation 0.81
What was examined, and what was not
Sources read
- arXiv listing abstract v1
Not examined
- full text
- figures and tables
- references and citing sentences
- relations to other papers
Levels run
- P abstract
Not run
- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,088 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
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