2021
DOI: 10.1140/epjc/s10052-021-08972-6
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Energy condition in unimodular f(R, T) gravity

Abstract: We study an interesting alternative of modified gravity theory, namely, the unimodular f(R, T) gravity in which R is the Ricci scalar and T is the trace of the stress–energy tensor. We study the viability of the model by using the energy conditions. We discuss the strong, weak, null and dominant energy conditions in terms of deceleration, jerk and snap parameters. We investigate energy conditions for reconstructed unimodular f(R, T) models and give some constraints on the parametric space of the model. We obse… Show more

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Cited by 16 publications
(7 citation statements)
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“…Capozziello et al [16] studied the role of the energy conditions in f (R) gravity. Studies involving the energy conditions have been undertaken in non-minimally coupled f (R, T) gravity [17], symmetric f (Q, T) gravity [18], unimodular F(R, T) gravity [19], and others. In a recent detailed analysis, Kontou and Sanders [20] considered the equations of motion in relation to the energy conditions in general relativity and quantum field theory.…”
Section: Introductionmentioning
confidence: 99%
“…Capozziello et al [16] studied the role of the energy conditions in f (R) gravity. Studies involving the energy conditions have been undertaken in non-minimally coupled f (R, T) gravity [17], symmetric f (Q, T) gravity [18], unimodular F(R, T) gravity [19], and others. In a recent detailed analysis, Kontou and Sanders [20] considered the equations of motion in relation to the energy conditions in general relativity and quantum field theory.…”
Section: Introductionmentioning
confidence: 99%
“…Following our previous construction of the Unimodular f (R, T ) gravity [98] and the Energy Conditions in Unimodular f (R, T ) gravity [118], in this paper we reconsidered cosmological inflation and the issue of reheating in the unimodular f (R, T ) gravity. At the first step, we analyzed in details the embedding of cosmological inflation within unimodular f (R, T ) gravity.…”
Section: Discussionmentioning
confidence: 99%
“…In this paper, we investigate cosmic inflation and reheating stage in the context of our proposed unimodular f (R, T ) gravity [98] (see also [118] for the energy conditions in this modified gravity scenario). By adopting the Jordan frame, we study the slow roll inflation, the rapid oscillation phase, the radiation dominated and the recombination eras and calculate the e-folds numbers during these epochs.…”
Section: Introductionmentioning
confidence: 99%
“…As it was noticed in the earlier works (see extensive discussion on the subject in [25,26] and references therein), NEC arise as a minimal requirement of both WEC and SEC and needs to be validated everywhere if matter is considered to be viable. Aforementioned energy conditions could be easily written down in the terms of energy density and anisotropic pressure (those definitions could be obtained from the timelike and null-like Raychaudhuri equations, derivation of which could be found in the papers [27,28]):…”
Section: Mit Bag Eos and Compact Starsmentioning
confidence: 99%