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• W2014248911 abstract "We explore whether multifield inflationary models make unambiguous predictions for fundamental cosmological observables. Focusing on N-quadratic inflation, we numerically evaluate the full perturbation equations for models with 2, 3, and O(100) fields, using several distinct methods for specifying the initial values of the background fields. All scenarios are highly predictive, with the probability distribution functions of the cosmological observables becoming more sharply peaked as N increases. For N=100 fields, 95% of our Monte Carlo samples fall in the ranges ns∈(0.9455,0.9534), α∈(-9.741,-7.047)×10-4, r∈(0.1445,0.1449), and riso∈(0.02137,3.510)×10-3 for the spectral index, running, tensor-to-scalar ratio, and isocurvature-to-adiabatic ratio, respectively. The expected amplitude of isocurvature perturbations grows with N, raising the possibility that many-field models may be sensitive to postinflationary physics and suggesting new avenues for testing these scenarios." @default.
• W2014248911 created "2016-06-24" @default.
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• W2014248911 date "2014-04-22" @default.
• W2014248911 modified "2023-10-16" @default.
• W2014248911 title "Simple Predictions from Multifield Inflationary Models" @default.
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• W2014248911 doi "https://doi.org/10.1103/physrevlett.112.161302" @default.
• W2014248911 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24815634" @default.
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