Zobrazeno 1 - 10
of 3 074
pro vyhledávání: '"Friedmann–Lemaître–Robertson–Walker metric"'
Publikováno v:
Chinese Journal of Physics. 77:646-657
In this work we study a non-flat Friedmann-Robertson-Walker universe filled with a pressure-less dark matter (DM) and Barrow holographic dark energy (BHDE) whose IR cutoff is the apparent horizon. Among various DE models, (BHDE) model shows the dynam
Autor:
Ion I. Cotaescu
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 10, Pp 1-20 (2021)
European Physical Journal
European Physical Journal
The classical and quantum theory of the Maxwell free field (or perturbation) minimally coupled to the gravity of local-Minkowskian spatially flat Friedmann–Lemaître–Robertson–Walker (FLRW) space-times is constructed in conformal local charts (
Publikováno v:
Chinese Journal of Physics. 73:56-73
In this work, we study the Tsallis holographic dark energy with Hubble horizon as IR cut-off with the energy density given by ρ Λ = 3 β 2 M p 2 H − 2 δ + 4 in f ( R , T ) theory. Considering a flat FRW Universe, we obtain the equation of state
Autor:
P. Das, K. P. Singh
Publikováno v:
Journal of Scientific Research. 13:779-784
In this paper, we study the Polytropic Gas Dark Energy model and New Agegraphic Dark Energy model in the flat Friedmann Robertson Walker (FRW) Universe and establish a correspondence between them for the scalar fields. This correspondence allows reco
Publikováno v:
Canadian Journal of Physics. 99:741-753
In the present paper, we have generalized the behaviors of the transit-decelerating to accelerating FRW cosmological model in f(R, T) gravity theory, where R and T are Ricci scalar and trace of the energy–momentum tensor, respectively. The solution
Publikováno v:
Iranian Journal of Physics Research, Vol 21, Iss 2, Pp 409-414 (2021)
In this paper, we study the modified gravity theory, where and represent the scalar-torsion and trace of energy-momentum tensor, respectively. According to our cosmological study, we show that the gravity theory has a good agreement with observations
Publikováno v:
Canadian Journal of Physics. 99:670-680
We study the mechanism of particle creation in the higher dimensional FLRW-type cosmological models by using variable cosmological and gravitational constants. The solution of the corresponding field equations is obtained by assuming a linear functio
Autor:
S. Surendra Singh, S. Kiranmala Chanu
Publikováno v:
Brazilian Journal of Physics. 51:1364-1370
We investigate the effect of particle creation on the evolution of n-dimensional Friedmann–Robertson–Walker (FRW) cosmological model in the framework of interacting variable gravitational fields and cosmological constants. An open thermodynamical
Publikováno v:
Gravitation and Cosmology. 27:281-291
We consider the Sharma–Mittal holographic dark energy (SMHDE) model within the framework of a spatially homogeneous and isotropic flat Friedmann-Robertson-Walker (FRW) Universe by taking various values of the model parameters $$R$$ and $$\delta$$ ,
Autor:
Peter O. Hess, M. Razeira, G. L. Volkmer, Dimiter Hadjimichef, César A. Z. Vasconcellos, B. E. J. Bodmann
Publikováno v:
Astronomische Nachrichten. 342:765-775
In this article we follow a previously developed theoretical approach, based in the tools of the singular semi-Riemannian geometry, to push the limits of time beyond the primordial spacetime singularity. By complexifying the Friedmann-Lemaitre-Robert