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Review of Local Non-Gaussianity from Multifield Inflation
Joint Authors
Byrnes, Christian T.
Choi, Ki-Young
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-18, 18 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-09-16
Country of Publication
Egypt
No. of Pages
18
Main Subjects
Abstract EN
We review models which generate a large non-Gaussianity of the local form.
We first briefly consider three models which generate the non-Gaussianity either at or after the end of inflation; the curvaton scenario, modulated (p)reheating, and an inhomogeneous end of inflation.
We then focus on ways of generating the non-Gaussianity during inflation.
We derive general conditions which a product or sum separable potential must satisfy in order to generate a large local bispectrum during slow-roll inflation.
As an application, we consider two-field hybrid inflation.
We then derive a formalism not based on slow roll which can be applied to models in which the slow-roll parameters become large before inflation ends.
An exactly soluble two-field model is given in which this happens.
Finally, we also consider further non-Gaussian observables, a scale dependence of fNL and the trispectrum.
American Psychological Association (APA)
Byrnes, Christian T.& Choi, Ki-Young. 2010. Review of Local Non-Gaussianity from Multifield Inflation. Advances in Astronomy،Vol. 2010, no. 2010, pp.1-18.
https://search.emarefa.net/detail/BIM-493550
Modern Language Association (MLA)
Byrnes, Christian T.& Choi, Ki-Young. Review of Local Non-Gaussianity from Multifield Inflation. Advances in Astronomy No. 2010 (2010), pp.1-18.
https://search.emarefa.net/detail/BIM-493550
American Medical Association (AMA)
Byrnes, Christian T.& Choi, Ki-Young. Review of Local Non-Gaussianity from Multifield Inflation. Advances in Astronomy. 2010. Vol. 2010, no. 2010, pp.1-18.
https://search.emarefa.net/detail/BIM-493550
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-493550