Constant-roll inflation with tachyon field in the holographic braneworld

Stojanovic, Marko; Bilić, Nevenko; Dimitrijevic, Dragoljub D; Djordjevic, Goran S; Milosevic, Milan (2024) Constant-roll inflation with tachyon field in the holographic braneworld. Classical and Quantum Gravity, 41 (16). ISSN 0264-9381

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Abstract

We study inflation driven by the tachyon field in the holographic braneworld by assuming the second slow-roll parameter η is constant. The parameter η can be either defined by the tachyon scalar field and the Hubble parameter or by the Hubble parameter only. By assuming a constant η, we derive and numerically solve a differential equation for the Hubble expansion rate. We calculate numerically the scalar spectral index and the tensor-to-scalar ratio. We confront the results with the observational data and find some constraints on the free model parameters. The swampland conjectures are discussed in the context of the constant-roll inflation, with some accent on the holographic model.

Item Type:	Article
Uncontrolled Keywords:	inflation; tachyon; braneworld
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Depositing User:	Ema Buhin Šaler
Date Deposited:	24 Mar 2026 15:17
URI:	http://fulir.irb.hr/id/eprint/11452
DOI:	10.1088/1361-6382/ad6058

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