Non-Gaussian isocurvature perturbations from inflation

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.R535· OSTI ID:527106

Linde, A ^[1]; Mukhanov, V ^[2]

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1. Physics Department, Stanford University, Stanford, California 94305-4060 (United States)
2. Institute for Theoretical Physics, ETH, Honggerberg 8093, Zurich (Switzerland)

We present a class of very simple inflationary models of two scalar fields which leads to non-Gaussian isothermal perturbations with a {open_quotes}blue{close_quotes} spectrum, n{gt}1. One of the models is inspired by supersymmetric theories where light scalar fields naturally acquire masses {approximately}H during inflation. Another model presumes that one of the fields has a nonminimal interaction with gravity {xi}R{sigma}{sup 2}. By a slight modification of parameters of these models one can obtain either Gaussian isothermal perturbations, or non-Gaussian adiabatic perturbations with n{gt}1. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 527106
• Journal Information: Physical Review, D, Vol. 56, Issue 2; Other Information: PBD: Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
INFLATIONARY UNIVERSE
PERTURBATION THEORY
COSMOLOGY
SUPERGRAVITY
INFLATION
SCALAR FIELDS
SPECTRA
SUPERSYMMETRY
FLUCTUATIONS
MICROWAVE RADIATION
BACKGROUND RADIATION
GALAXIES
ENTROPY