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- W2026087059 abstract "We consider inflation within the context of what is arguably the simplest non-metric extension of Einstein gravity. There non-metricity is described by a single graviscalar field with a non-minimal kinetic coupling to the inflaton field $Psi$, parameterized by a single parameter $gamma$. We discuss the implications of non-metricity for chaotic inflation and find that it significantly alters the inflaton dynamics for field values $Psi gtrsim M_P/gamma$, dramatically changing the qualitative behaviour in this regime. For potentials with a positive slope non-metricity imposes an upper bound on the possible number of e-folds. For chaotic inflation with a monomial potential, the spectral index and the tensor-to-scalar ratio receive small corrections dependent on the non-metricity parameter. We also argue that significant post-inflationary non-metricity may be generated." @default.
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- W2026087059 date "2012-05-21" @default.
- W2026087059 modified "2023-09-30" @default.
- W2026087059 title "Non-metric chaotic inflation" @default.
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- W2026087059 doi "https://doi.org/10.1088/1475-7516/2012/05/023" @default.
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