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arXiv · 2001.00040

Relaxing the TCC Bound on Inflationary Cosmology?

Vahid Kamali·Robert Brandenberger
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Abstract

We demonstrate that the strict upper bounds on the energy scale of inflation and on the tensor-to-scalar ratio can be somewhat relaxed if we assume that - after an initial period of slow rolling when scales probed today in CMB experiments exit the Hubble radius - the equation of state of the background changes to correspond to an almost marginally accelerating universe. Constructing an actual model in which this happens appears, however, to be unnatural.

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Vahid Kamali, Robert Brandenberger. 2020-04-23. Relaxing the TCC Bound on Inflationary Cosmology?. https://doi.org/10.1140/epjc%2Fs10052-020-7908-8

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