How Different Connections in Flat FLRW Geometry Impact Energy Conditions in f(Q)$f(Q)$ Theory?

被引：12
作者：
Subramaniam, Ganesh [1 ]
De, Avik [1 ]
Loo, Tee-How [2 ]
Goh, Yong Kheng [1 ]
机构：
[1] Univ Tunku Abdul Rahman, Dept Math & Actuarial Sci, Jalan Sungai Long, Cheras 43000, Malaysia
[2] Univ Malaya, Inst Math Sci, Fac Sci, Kuala Lumpur 50603, Malaysia
来源：
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS | 2023年 / 71卷 / 8-9期
关键词：
energy conditions; symmetric teleparallel theory; f(Q) gravity; GRAVITATIONAL COLLAPSE; SINGULARITIES;
D O I：
10.1002/prop.202300038
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this study of the modified f(Q) theory of gravity in the spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime, all the affine connections compatible with the symmetric teleparallel structure are explored; three classes of such connections exist, each involving an unknown time-varying parameter gamma(t). Assuming ordinary barotropic fluid as the matter source, the Friedmann-like pressure and energy equations are derived. Next constraints on the parameters of two separate f(Q) models, f(Q)=Q+beta Q(2) and f(Q)=Q+beta root-Q from the traditional energy conditions are imposed. Observational values of some prominent cosmological parameters are used for this purpose, yielding an effective equation of state omega(eff) = -0.82.
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页数：20
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