On the presence of twinlike models in cosmology

D. Bazeia; J. D. Dantas

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On the presence of twinlike models in cosmology

D. Bazeia, J. D. Dantas

High Energy Physics - Theory · Submitted 27 Feb 2012

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim The presence of curvature forbids the construction of twinlike models in the cosmological scenario here investigated.

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The compiled record

The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,515 input tokens, $0.0001 reported.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.93 · human participants 0.01 · controlled comparison 0.03 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.10 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; show every role.

We study cosmological models described by a single real scalar field. We work within the first-order framework, and we show how the first-order equations simplify the investigation, leading to a direct search of twinlike theories. The procedure is used to introduce distinct models that support the same first-order equations, with the very same energy densities and pressure in flat spacetime. The presence of curvature forbids the construction of twinlike models in the cosmological scenario here investigated.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We study cosmological models described by a single real scalar field.	background 0.62	0.71	0.02	asserted 0.94
s1	We work within the first-order framework, and we show how the first-order equations simplify the investigation, leading to a direct search of twinlike theories.	method 0.96	0.91	0.06	asserted 1.00
s2	The procedure is used to introduce distinct models that support the same first-order equations, with the very same energy densities and pressure in flat spacetime.	result 0.64	0.91	0.12	asserted 1.00
s3	The presence of curvature forbids the construction of twinlike models in the cosmological scenario here investigated.	result 0.91	0.81	0.77	asserted 1.00

What kind of paper the classifier reports this is: theoretical result 0.95 · evidence from proof or derivation 0.99.

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

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P abstract

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S sections
T body sentences
C citations
R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

We study cosmological models described by a single real scalar field. We work within the first-order framework, and we show how the first-order equations simplify the investigation, leading to a direct search of twinlike theories. The procedure is used to introduce distinct models that support the same first-order equations, with the very same energy densities and pressure in flat spacetime. The presence of curvature forbids the construction of twinlike models in the cosmological scenario here investigated.

Human review

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How the literature uses it

3 arXiv papers cite this in 9 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 4 sentences without a confident label

Contests it 1 paper

Due to the form of the first-order formalism, the authors of Ref. [ref] failed to find twinlike models for cosmological models with nonzero spatial curvature.

Cosmological twinlike models with multi scalar fields · Introduction · contest 0.88

Compares with it 1 paper

For convenience, and to compare with Ref. [ref] , we take $4 πG=1$.

Cosmological twinlike models with multi scalar fields · The model · 0.84

Cites it as background 1 paper

Models with this feature are called the twinlike models, which were first observed in [ref] , and later developed in [ref] .

$K$-field kinks: stability, exact solutions and new features · Type II models · 0.92

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