We study adiabatic and isocurvature perturbations produced during a period of cosmological inflation. We compute the power spectra and cross spectra of the curvature and isocurvature modes, as well as the tensor perturbation spectrum in terms of the slow-roll parameters. We provide two consistency relations for the amplitudes and spectral indices of the corresponding power spectra. These relations represent a definite prediction and a test of inflationary models which should be adopted when studying cosmological perturbations through the cosmic microwave background in forthcoming satellite experiments.

Adiabatic and Isocurvature Perturbations from Inflation: Power Spectra and Consistency Relation

BARTOLO, NICOLA;MATARRESE, SABINO;
2001

Abstract

We study adiabatic and isocurvature perturbations produced during a period of cosmological inflation. We compute the power spectra and cross spectra of the curvature and isocurvature modes, as well as the tensor perturbation spectrum in terms of the slow-roll parameters. We provide two consistency relations for the amplitudes and spectral indices of the corresponding power spectra. These relations represent a definite prediction and a test of inflationary models which should be adopted when studying cosmological perturbations through the cosmic microwave background in forthcoming satellite experiments.
2001
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2469808
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