Dark energy on higher dimensional spherically symmetric Brans–Dicke universe

Singh, Kangujam Priyokumar; Singh, Pheiroijam Suranjoy

doi:10.1016/j.cjph.2019.05.003

Cited by 7 publications

(5 citation statements)

References 59 publications

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“…From these, it would be appropriate to conclude that the universe will be progressively dominated by this cryptic DE. Similar increasing dominant nature of DE can also be seen in [36,82,83].…”

Section: Discussionsupporting

confidence: 72%

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Vacuum Energy in Saez-Ballester Theory and Stabilization of Extra Dimensions

Singh

2022

Universe

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In this work, we study a spherically symmetric metric in 5D within the framework of Saez-Ballester Theory, where minimal dark energy-matter interaction occurs. We predict that the expanding isotropic universe will be progressively DE dominated. We estimate few values of the deceleration parameter, very close to the recently predicted values. We obtain the value of the DE EoS parameter as ω=−1. Additionally, we measure the value of the overall density parameter as Ω=0.97(≈1), in line with the notion of a close to or nearly (not exactly) flat universe. We predict that the model universe starts with the Big-Bang and ends at the Big Freeze singularity. In general, we cannot find conditions for stabilization of extra dimensions in general relativity, and all dimensions want to be dynamical. Here, we present two possible conditions to solve this stabilization problem in general relativity.

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Section: Discussionsupporting

confidence: 72%

“…Recent works on some of the different forms of HDE can be seen in [30][31][32][33]. Construction of interacting HDE and dark matter (DM) models in spherically symmetric space-time settings can be observed in [34][35][36]. Interacting models can successfully represent modified gravity in the Einstein frame [37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Vacuum Energy in Saez-Ballester Theory and Stabilization of Extra Dimensions

Singh

2022

Universe

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“…In (27) a perfect fluid cosmological model in Lyra Geometry was studied by using constant deceleration parameter in five dimensional LRS Bianchi type-I Space-time.Considering reasonable cosmological assumptions within the limit of the present cosmological scenario, a spherically symmetric metric in five dimensional setting in the framework of Lyra geometry is analysed (28) . A cosmological model in 5D spherically symmetric space-time with energy momentum tensors of minimally interacting fields of dark matter and holographic dark energy in Brans-Dicke theory was constructed by (29) . Authors in (30)(31)(32)(33)(34)(35)(36)(37) are the authors who studied different string cosmological models in general relativity in different context in various space-times.…”

Section: Introductionmentioning

confidence: 99%

Higher Dimensional LRS Bianchi Type-I String Cosmological Model with Bulk Viscosity in General Relativity

Priyokumar¹,

Baro²

2021

IJST

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Objective: To present a new solution to the field equations obtained for higher dimensional LRS Bianchi type-I universe generated by means of a cloud of strings with particles connected to them with bulk viscosity in general relativity. Methods: To obtain the solutions of field equations of higher dimensional LRS Bianchi type-I universe we consider that the shear scalar of the model is proportional to the scalar expansion of the model (σ αθ ), which leads to, c = b ∧ n. The physical and geometrical behaviors of the model universe are studied by comparing with the present cosmological scenario and observations. Findings: It is observed that our model is anisotropic, expanding and decelerates at early stage and then accelerates in late universe giving the inflation model universe. Novelty: We obtained new solution to the field equations for higher dimensional LRS Bianchi type-I generated by means of a cloud of strings with bulk viscous fluid in general relativity.

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“…From literatures and observations [4,[19][20][21][22][23][24][25], it is obvious that the massive universe is dominated by the mystic DE with negative pressure and positive energy density. This qualifies DE a completely irony of nature as the dominating component is also the least explored.…”

Section: Introductionmentioning

confidence: 99%

“…Since we are living in a 4D space-time, the hidden extra dimension in 5D is highly likely to be associated with the invisible DM and DE [83]. Few of the worth mentioning works on higher dimensional space-time during the last few years can be seen in [20,[84][85][86][87][88][89][90][91]93].…”

Section: Introductionmentioning

confidence: 99%

A higher dimensional cosmological model for the search of dark energy source

Singh

2020

Int. J. Geom. Methods Mod. Phys.

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With due consideration of reasonable cosmological assumptions within the limit of the present cosmological scenario, we have analysed a spherically symmetric metric in 5D setting within the framework of Lyra manifold. The model universe is predicted to be a DE model, dominated by vacuum energy. The model represents an oscillating model, each cycle evolving with a big bang and ending at a big crunch, undergoing a series of bounces. The universe is isotropic and undergoes super-exponential expansion. The value of Hubble's parameter is measured to be H = 67.0691 which is very close to H0 = 67.36±0.54kms −1 M pc −1 , the value estimated by the latest Planck 2018 result. A detailed discussion on the cosmological parameters obtained is also presented with graphs.

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Dark energy on higher dimensional spherically symmetric Brans–Dicke universe

Cited by 7 publications

References 59 publications

Vacuum Energy in Saez-Ballester Theory and Stabilization of Extra Dimensions

Vacuum Energy in Saez-Ballester Theory and Stabilization of Extra Dimensions

Higher Dimensional LRS Bianchi Type-I String Cosmological Model with Bulk Viscosity in General Relativity

A higher dimensional cosmological model for the search of dark energy source

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