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Vahid Kamali

Vahid Kamali

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId: 36657252800
HIndex:
Faculty: Faculty of Science
Address:
Phone: 08138388856

Research

Title
Relaxing the TCC bound on inflationary cosmology?
Type
JournalPaper
Keywords
inflation tensor-to-scalar ratio
Year
2020
Journal EUROPEAN PHYSICAL JOURNAL C
DOI
Researchers Vahid Kamali ، Robert Brandenberger

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 equa- tion 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.