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A bulk inflaton from large volume extra dimensions
High Energy Physics - Theory · Submitted 10 Jan 2010
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim These compactifications can help explain the weakness of four-dimensional gravity and, as we show here, they also have the capacity to produce reasonable potentials for an inflaton field.
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The abstract, sentence by sentence
The universe may have extra spatial dimensions with large volume that we cannot perceive because the energy required to excite modes in the extra directions is too high. Many examples are known of such manifolds with a large volume and a large mass gap. These compactifications can help explain the weakness of four-dimensional gravity and, as we show here, they also have the capacity to produce reasonable potentials for an inflaton field. Modeling the inflaton as a bulk scalar field, it becomes very weakly coupled in four dimensions, and this enables us to build phenomenologically acceptable inflationary models with tunings at the few per mil level. We speculate on dark matter candidates and the possibility of braneless models in this setting.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The universe may have extra spatial dimensions with large volume that we cannot perceive because the energy required to excite modes in the extra directions is too high. | background 1.00 | 0.04 | 0.03 | hedged possibility 1.00 |
| s1 | Many examples are known of such manifolds with a large volume and a large mass gap. | background 1.00 | 0.06 | 0.03 | asserted 1.00 |
| s2 | These compactifications can help explain the weakness of four-dimensional gravity and, as we show here, they also have the capacity to produce reasonable potentials for an inflaton field. | contribution 0.66 | 0.73 | 0.60 | asserted 0.71 |
| s3 | Modeling the inflaton as a bulk scalar field, it becomes very weakly coupled in four dimensions, and this enables us to build phenomenologically acceptable inflationary models with tunings at the few per mil level. | result 0.49 | 0.86 | 0.45 | asserted 0.95 |
| s4 | We speculate on dark matter candidates and the possibility of braneless models in this setting. | future work 0.97 | 0.19 | 0.04 | speculative 1.00 |
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The paper
Original abstract
The universe may have extra spatial dimensions with large volume that we cannot perceive because the energy required to excite modes in the extra directions is too high. Many examples are known of such manifolds with a large volume and a large mass gap. These compactifications can help explain the weakness of four-dimensional gravity and, as we show here, they also have the capacity to produce reasonable potentials for an inflaton field. Modeling the inflaton as a bulk scalar field, it becomes very weakly coupled in four dimensions, and this enables us to build phenomenologically acceptable inflationary models with tunings at the few per mil level. We speculate on dark matter candidates and the possibility of braneless models in this setting.
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How the literature uses it
6 arXiv papers cite this in 7 sentences
Papers citing it · 4 sentences without a confident label
Contests it 1 paper
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The attempt in Ref. [ref] , however, still requires further fine-tuning as the simple model with $λϕ^4$ potential does not fit the recent WMAP data in $(n_s-r)$ plane within $2σ$ confidence level [Indeed a phenomenologically modified potential $V=λe^2αϕ^2/v^2(ϕ^2 - v^2)^2$ is tried in [ref] to reduce the deviation.].
Hyperbolic Inflation · Introduction · contest 0.82
Cites it as background 2 papers
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Also there have been works considering CHS in the context of cosmology [ref] , in particular, inflation by embedding the chaotic inflation model into higher dimensions with CHS without considering NM term [ref] .
Hyperbolic Inflation · Introduction · 0.92
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In this paper we consider compact hyperbolic spaces which have been less intensively studied in physics so far [ref] but enjoy several interesting mathematical properties (see [ref] for a mathematical introduction).
Compact hyperbolic extra dimensions: a M-theory solution and its implications for the LHC · Introduction · 0.83
What it cites · 15 sentences without a confident label
Uses the method or tool of 1 paper
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Power spectrum First we quantify the naturalness of $V$ as a slow-roll inflaton potential using the parameters described in [ref] .
Reconstructing the Inflaton Potential---in Principle and in Practice · A slow-roll model · 0.93
Cites as background 8 papers
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Compactification on these spaces, and the associated cosmology, has been studied in [ref] .
Compact Hyperbolic Extra Dimensions: Branes, Kaluza-Klein Modes and Cosmology · Introduction · 0.82
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Compactification on these spaces, and the associated cosmology, has been studied in [ref] .
Large Extra Dimensions and Cosmological Problems · Introduction · 0.82
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Compactification on these spaces, and the associated cosmology, has been studied in [ref] .
Homogeneity, Flatness and "Large" Extra Dimensions · Introduction · 0.82
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