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De-Sitter Quantum Loops as the origin of Primordial Non-Gaussianities

An, Haipeng and Wise, Mark B. and Zhang, Zipei (2019) De-Sitter Quantum Loops as the origin of Primordial Non-Gaussianities. Physical Review D, 99 (5). Art. No. 056007. ISSN 2470-0010. doi:10.1103/PhysRevD.99.056007.

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It was recently pointed out that in some inflationary models quantum loops containing a scalar of mass m that couples to the inflaton can be the dominant source of primordial non-Gaussianities. We explore this phenomenon in the simplest such model focusing on the behavior of the primordial curvature fluctuations for small m/H. Explicit calculations are done for the three- and four-point curvature fluctuation correlations. Constraints on the parameters of the model from the cosmic microwave background limits on primordial non-Gaussianity are discussed. The bispectrum in the squeezed limit and the trispectrum in the compressed limit are examined. The form of the n-point correlations as any partial sum of wave vectors gets small is determined.

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Additional Information:© 2019 Published by the American Physical Society under the terms of the the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 18 September 2018; published 15 March 2019. H. A. is supported by the Recruitment Program for Young Professionals of the 1000 Talented Plan and the Tsinghua University Initiative Scientific Research Program. M. B. W. is supported by the DOE Grant No. DE-SC0011632 and the Walter Burke Institute for Theoretical Physics.
Group:Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
1000 Young Talents Program042002006
Tsinghua University53330200618
Department of Energy (DOE)DE-SC0011632
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
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CALT-TH 2018-027
Issue or Number:5
Record Number:CaltechAUTHORS:20180620-154220173
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87280
Deposited By: Joy Painter
Deposited On:20 Jun 2018 22:47
Last Modified:15 Nov 2021 20:46

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