Inflationary models inducing non-Gaussian metric fluctuations
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We construct explicit models of multifield inflation in which the primordial metric fluctuations do not necessarily obey Gaussian statistics. These models are realizations of mechanisms in which non-Gaussianity is first generated by a light scalar field and then transferred into curvature fluctuations. The probability distribution functions of the metric perturbation at the end of inflation are computed. This provides a guideline for designing strategies to search for non-Gaussian signals in future CMB and large scale structure surveys.
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Non-adiabatic perturbations produced during multi-field inflation can generate detectable non-Gaussianity in the density field after inflation, in models such as the curvaton scenario or reheating.
“Furthermore, non-adiabatic perturbations produced during multi-field inflation can certainly generate detectable non-Gaussianity in the density field after inflation, in models such as the curvaton scenario [10] (see also [11]) or reheating [12, 13, 14, 15].”
From Non-Gaussianities in two-field inflation (2006) · cites this paper as [12]
The introduction (p. 1) says multifield inflation can produce non-Gaussian isocurvature fluctuations that are transferred to curvature fluctuations, and discusses prospects for detecting primordial non-Gaussianity. But the paper’s models transfer those fluctuations during inflation; it does not establish the cited curvaton or reheating examples as mechanisms producing non-Gaussianity after inflation. (LLM, conf=0.87)
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Research works printed but not linked: 1
- [10]D.S. Salopek, Phys. Rev. D 45 (1992) 1139; D.S. Salopek and J.R. Bond, Phys. Rev. D 42 (1990) 3936; D. La and P.J. Steinhardt, Phys. Rev. Lett. 62 (1989) 376; K. Ya- mamoto et al. , Phys. Rev. D 46 (1992) 4206; D.H. Lyth, C. Ungarelli, and D. Wands, arXiv:astro-ph/0208055. · arXiv
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Non-Gaussianities in two-field inflation
Vernizzi, F., & Wands, D. (2006) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2006/05/019 · Cited by 274 · see citing works
Review of Local Non‐Gaussianity from Multifield Inflation
Byrnes, C. T., & Choi, K.-Y. (2010) · Advances in Astronomy · doi:10.1155/2010/724525 · Cited by 178 · see citing works
Conditions for large non-Gaussianity in two-field slow-roll inflation
Byrnes, C. T., Choi, K.-Y., & Hall, L. M. H. (2008) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2008/10/008 · Cited by 143 · see citing works
- Authors
- Bernardeau, F., & Uzan, J.-P.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Université Paris-Sud (FR)
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2003-06-04
- Volume
- 67
- Issue
- 12
- Pages
- 121301
- ISSN
- 0556-2821 (ISSN-L)
- 1089-4918
- OpenAlex
- W1981110472
- Cited by
- 160
- References
- 0
- Citations by year
- 2025: 1 · 2022: 1 · 2021: 3 · 2019: 1 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 3 · 2014: 5 · 2013: 13 · 2012: 14
- FWCI
- 8.68
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- HAL (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Black Holes and Theoretical Physics
- Keywords
- multi-field inflation, non-Gaussianity, curvature perturbations, light scalar fields, probability distribution functions, cosmic microwave background, large-scale structure, inflationary models
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