Late-time-accelerated expansion arisen from gauge fields in an anisotropic background and a fruitful trick for Noether’s approach

Abstract

In this paper, a modified teleparallel gravity action containing a coupling between a scalar field potential and magnetism, in anisotropic and homogeneous backgrounds, is investigated through Noether symmetry approach. The focus of this work is to describe late-time-accelerated expansion. Since finding analytical solutions carrying all conserved currents emerged by Noether symmetry approach, is very difficult, hence regularly in the literature, the authors split the total symmetry into sub-symmetries and then select, usually, some of them to be carried by the solutions. This manner limits the forms of unknown functions obtained. However, in ref.[68], B.N.S. approach was proposed in order to solve such problems but its main motivation was carrying more conserved currents by solutions. In this paper, by eliminating the aforementioned limitation as much as possible, a trick leading to some graceful forms of unknown functions is suggested. Through this fruitful approach, the solutions may carry more conserved currents than usual ways and maybe new forms of symmetries. I named this new approach to be CSSS-trick (Combination of Sub-symmetries through Special Selections). With this approach, it is demonstrated that the unified dark matter potential is deduced by the gauge fields. Utilizing the B-function method, a detailed data analysis of results obtained yielding perfect agreements with recent observational data are performed. And finally, the Wheeler-De Witt (WDW) equation is discussed to demonstrate recovering the Hartle criterion due to the oscillating feature of the wave function of the universe.

Investigating the physical and geometrical parameters of the cosmological models with anisotropic background

“…Tajahmad [75] has considered the similar relation to reconstructed the F(T) gravity. Most recent, Tajahmad [76] has shown that late time accelerated expansion arisen from gauge fields in an anisotropic background. It can be noted that for k becomes unity, the space-time reduces to be isotropic.…”

Teleparallel Gravity: From Theory to Cosmology

“…c η 1,a + b η 4,a = 0 , (6.183) introduces the constraint ã η 1,ã = 0, where ã now becomes the standard isotropic FLRW scale factor since a = b = c = ã. This extra constraint does not appear in the standard f (T ) FLRW Noether equations.Next, TEGR in the presence of a scalar-electromagnetic field coupling is considered[1005] …”

Raychaudhuri-based reconstruction of anisotropic Einstein–Maxwell equation in 1+3 covariant formalism of f(R)-gravity

“…Cosmological models are investigated via several powerful tools: exact solutions, phase space [25,26], B-function method [27], Noether symmetry approach [28][29][30][31], Beyond Noether symmetry approach (B.N.S.) [32], Noether symmetry approach using CSSS-trick [33], Reconstruction methods [34][35][36][37][38], etc. Recently, a new strategy to the reconstruction of f (R)-gravity models using Raychaudhuri equation has been proposed by Choudhury et al [1].…”