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arXiv · 1503.06490

Stabilising the Planck mass shortly after inflation

Carsten van de Bruck·Adam J. Christopherson·Mathew Robinson
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Abstract

We consider a model of the early universe which consists of two scalar fields: the inflaton, and a second field which drives the stabilisation of the Planck mass (or gravitational constant). We show that the non-minimal coupling of this second field to the Ricci scalar sources a non-adiabatic pressure perturbation. By performing a fully numerical calculation we find, in turn, that this boosts the amplitude of the primordial power spectrum after inflation.

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Carsten van de Bruck, Adam J. Christopherson, Mathew Robinson. 2015-03-22. Stabilising the Planck mass shortly after inflation. https://doi.org/10.1103/physrevd.91.123503

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