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- Title
A flat FLRW dark energy model in f(Q,C)-gravity theory with observational constraints.
- Authors
Pradhan, Anirudh; Dixit, Archana; Zeyauddin, M.; Krishnannair, S.
- Abstract
In the recently suggested modified non-metricity gravity theory with boundary term in a flat FLRW spacetime universe, dark energy scenarios of cosmological models are examined in this study. An arbitrary function, f (Q , C) = Q + α C 2 , has been taken into consideration, where Q is the non-metricity scalar, C is the boundary term denoted by C = R ̈ − Q , and α is the model parameter, for the action that is quadratic in C. The Hubble function H (z) = H 0 [ c 1 (1 + z) n + c 2 ] 1 2 , where H 0 is the current value of the Hubble constant and n , c 1 and c 2 are arbitrary parameters with c 1 + c 2 = 1 , has been used to examine the dark energy characteristics of the model. We discovered a transit phase expanding universe model that is both decelerated in the past and accelerated in the present, and we discovered that the dark energy equation of state (EoS) ω (d e) behaves as (− 1 ≤ ω (d e) < 2). The Om diagnostic analysis reveals the quintessence behavior in the present and the cosmological constant scenario in the late-time universe. Finally, we calculated the universe's current age, which was found to be quite similar to recent data.
- Subjects
DARK energy; ENERGY levels (Quantum mechanics); HUBBLE constant; EXPANDING universe; COSMOLOGICAL constant; ARBITRARY constants
- Publication
International Journal of Geometric Methods in Modern Physics, 2024, Vol 21, Issue 9, p1
- ISSN
0219-8878
- Publication type
Article
- DOI
10.1142/S0219887824501676