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Preheating with Fractional Powers

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arxiv 1502.06135 v2 pith:EBLYF553 submitted 2015-02-21 hep-th astro-ph.COgr-qchep-ph

classification hep-thastro-ph.COgr-qchep-ph
keywords inflatonfieldpotentialfractionalinstabilitypreheatinganharmonicassume
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We consider preheating in models in which the potential for the inflaton is given by a fractional power, as is the case in axion monodromy inflation. We assume a standard coupling between the inflaton field and a scalar matter field. We find that in spite of the fact that the oscillation of the inflaton about the field value which minimizes the potential is anharmonic, there is nevertheless a parametric resonance instability, and we determine the Floquet exponent which describes this instability as a function of the parameters of the inflaton potential.

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  1. Quantum Lifts of Noninteger Power Law Field Theories

    hep-th 2026-08 conditional novelty 6.0 of 10

    β-shifted normal ordering yields quantum lifts for noninteger power-law potentials with α>2, and tames the divergent Stokes amplitude in the σ=4 Pöschl-Teller model into an O(g^{3/4}) scaling.

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