T2- inflation: Sourced by energy–momentum squared gravity

Seyed Ali Hosseini Mansoori, Fereshteh Felegary, Mahmood Roshan*, Özgür Akarsu, Mohammad Sami

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In this paper, we examine chaotic inflation within the context of the energy–momentum squared gravity (EMSG) focusing on the energy–momentum powered gravity (EMPG) that incorporates the functional f(T2)∝(T2)β in the Einstein–Hilbert action, in which β is a constant and T2≡TμνTμν where Tμν is the energy–momentum tensor, which we consider to represent a single scalar field with a power-law potential. We also demonstrate that the presence of EMSG terms allows the single-field monomial chaotic inflationary models to fall within current observational constraints, which are otherwise disfavored by Planck and BICEP/Keck findings. We show that the use of a non-canonical Lagrangian with chaotic potential in EMSG can lead to significantly larger values of the non-Gaussianity parameter, fNlequi whereas EMSG framework with canonical Lagrangian gives rise to results similar to those of the standard single-field model.

Original languageEnglish
Article number101360
JournalPhysics of the Dark Universe
Volume42
DOIs
Publication statusPublished - Dec 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Fingerprint

Dive into the research topics of 'T2- inflation: Sourced by energy–momentum squared gravity'. Together they form a unique fingerprint.

Cite this