Transients in finite inflation

Abstract

We test a model of inflation with a fast-rolling kinetic-dominated initial condition against data from Planck using Markov chain Monte Carlo parameter estimation. We test both an $m^2{\varphi }^2$ potential and the $R+R^2$ gravity model and perform a full numerical calculation of both the scalar and tensor primordial power spectra. We find a slight (though not significant) improvement in fit for this model over the standard eternal slow-roll case.

8 pages including 10 figures. V2: Final version accepted for publication in PRD. Various changes to improve the clarity, plus new section (V) on the $R+R^2$ gravity model

References in corpus (2)

• Just enough inflation: power spectrum modifications at large scales
• Holographic bounds and finite inflation

Cited by in corpus (16)

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• Simple single-field inflation models with arbitrarily small tensor/scalar ratio
• Analytical investigation of pre-inflationary effects in the primordial power spectrum: From General Relativity to hybrid Loop Quantum Cosmology
• Logolinear series expansions with applications to primordial cosmology
• Viability of slow-roll inflation in light of the non-zero k_min measured in the CMB power spectrum
• Reassessing Dust's Role in Forming the CMB
• Choice of vacuum state and the relation between inflationary and Planck scales
• Quantum initial conditions for curved inflating universes
• A Pop III generated dust screen at z~16
• Primordial perturbations in kinetically dominated regimes of general relativity and hybrid quantum cosmology
• Finite inflation in curved space
• An upper bound on the reheat temperature for short duration inflation