Physics of the Dark Universe, Volume (42), No (42), Year (2023-12) , Pages (101360-101371)

Title : ( T2- inflation: Sourced by energy–momentum squared gravity )

Authors: Seyed Ali Hosseini Mansoori , Fereshteh Felegary , Mahmood Roshan , Ozgur Akarsu , Mohammad Sami ,

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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 $f(\\\\mathbb{T}^2)\\\\propto (\\\\mathbb{T}^2)^{\\\\beta}$ in the Einstein-Hilbert action, in which $\\\\beta$ is a constant and $\\\\mathbb{T}^2\\\\equiv T_{\\\\mu \\\\nu}T^{\\\\mu \\\\nu}$ where $T_{\\\\mu \\\\nu}$ 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, $f_{\\\\rm Nl}^{\\\\rm equi}$ whereas EMSG framework with canonical Lagrangian gives rise to results similar to those of the standard single-field model.


, Energy, Momentum, Squared, Gravity
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author = {Seyed Ali Hosseini Mansoori and Fereshteh Felegary and Roshan, Mahmood and Ozgur Akarsu and Mohammad Sami},
title = {T2- inflation: Sourced by energy–momentum squared gravity},
journal = {Physics of the Dark Universe},
year = {2023},
volume = {42},
number = {42},
month = {December},
issn = {2212-6864},
pages = {101360--101371},
numpages = {11},
keywords = {Energy-Momentum-Squared-Gravity},


%0 Journal Article
%T T2- inflation: Sourced by energy–momentum squared gravity
%A Seyed Ali Hosseini Mansoori
%A Fereshteh Felegary
%A Roshan, Mahmood
%A Ozgur Akarsu
%A Mohammad Sami
%J Physics of the Dark Universe
%@ 2212-6864
%D 2023