Report/Journal Article

PUBDB-2016-04413

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Simple Emergent Power Spectra from Complex Inflationary Physics

Dias, M. (Corresponding author)DESY* ; Frazer, J.DESY* ; Marsh, M. C. D.

2016
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.117.141303

Report No.: DESY-16-073

Abstract: We construct ensembles of random scalar potentials for Nf-interacting scalar fields using nonequilibrium random matrix theory, and use these to study the generation of observables during small-field inflation. For N$_f$=O(few), these heavily featured scalar potentials give rise to power spectra that are highly nonlinear, at odds with observations. For N$_f$≫1, the superhorizon evolution of the perturbations is generically substantial, yet the power spectra simplify considerably and become more predictive, with most realizations being well approximated by a linear power spectrum. This provides proof of principle that complex inflationary physics can give rise to simple emergent power spectra. We explain how these results can be understood in terms of large N$_f$ universality of random matrix theory.

Keyword(s): matrix model: random ; potential: scalar ; power spectrum: linear ; cosmic background radiation ; interaction: scalar ; inflation ; universality ; perturbation ; nonlinear

Note: 5 pages, 2 figures, minor comments added to match PRL version

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
2. SFB 676 C06 - Skalarfelder in der Kosmologie: Inflation, Dunkle Materie und Dunkle Energie (C06) (28955575) (28955575)
3. STRINGFLATION - Inflation in String Theory - Connecting Quantum Gravity with Observations (647995) (647995)
4. TOI - Theoretical Foundations and Observational Tests of Inflationary Cosmology (279617) (279617)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2016

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint/Report Dias, M. (Corresponding author)DESY* ; Frazer, J. (Corresponding author)DESY* ; Marsh, M. C. D. (Corresponding author)
Simple emergent power spectra from complex inflationary physics
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