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Paper detail

Relaxing the TCC Bound on Inflationary Cosmology?

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.

preprint2020arXivOpen access
Vahid KamaliRobert Brandenberger
astro-ph.COhep-phgr-qchep-th
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Vahid KamaliRobert Brandenberger

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