Correlated adiabatic and isocurvature perturbations from double inflation
Open accessAbstract
It is shown that double inflation (two minimally coupled massive scalar fields) can produce correlated adiabatic and isocurvature primordial perturbations. Depending on the two relevant parameters of the model, the contributions to the primordial perturbations are computed, with special emphasis on the correlation, which can be quantitatively represented by a correlation spectrum. Finally the primordial spectra are evolved numerically to obtain the CMBR anisotropy multipole expectation values. It turns out that the existence of mixing and correlation can alter very significantly the temperature fluctuation predictions.
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The paper's conclusion that f_NL is small for the specific double quadratic inflation model investigated in Sec. 5 is in qualitative agreement with an improved numerical calculation by the authors of [22].
“Note added: After completing this work we have learnt [50] that our conclusion that f NL is small for the specific double quadratic inflation model investigated in Sec. 5 is in qualitative agreement with an improved numerical calculation by the authors of [22].”
From Non-Gaussianities in two-field inflation (2006) · cites this paper as [50]
The Introduction (p. 2) and Double Inflation section (p. 3) describe a two-field inflation model, but the copy does not report an f_NL calculation or a comparison with an improved numerical calculation. Searches for f_NL and non-Gaussianity found no passage addressing that claimed agreement. (LLM, conf=0.76)
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Perturbations of a Cosmological Model and Angular Variations of the Microwave Background
Sachs, R. K., & Wolfe, A. M. (1967) · The Astrophysical Journal · doi:10.1086/148982 · Cited by 1,815 · see citing works
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FIVE-YEAR<i>WILKINSON MICROWAVE ANISOTROPY PROBE</i>OBSERVATIONS: COSMOLOGICAL INTERPRETATION
Komatsu, E., Dunkley, J., Nolta, M. R., Bennett, C. L., Gold, B., Hinshaw, G., Jarosik, N., Larson, D., Limon, M., Page, L., et al. (2009) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/180/2/330 · Cited by 5,786 · see citing works
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
- Authors
- Langlois, D.
- Affiliations
- Centre National de la Recherche Scientifique (FR)
- Corresponding author
- Langlois, David
- ORCID
- Langlois, David
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 1999-05-13
- Volume
- 59
- Issue
- 12
- ISSN
- 0556-2821 (ISSN-L)
- 1089-4918
- OpenAlex
- W2037606065
- Cited by
- 226
- References
- 1
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 6 · 2023: 3 · 2022: 5 · 2021: 6 · 2020: 3 · 2019: 4 · 2018: 8 · 2017: 5 · 2016: 7 · 2015: 9 · 2014: 9 · 2013: 7 · 2012: 15
- FWCI
- 7.92
- 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)
- 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 › Dark Matter and Cosmic Phenomena
- Keywords
- double inflation, adiabatic perturbations, isocurvature perturbations, correlation spectrum, massive scalar field, minimally coupled scalar field, cosmic microwave background anisotropies, primordial power spectrum
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