Bouncing cosmology from warped extra dimensional scenario

Abstract

From the perspective of four dimensional effective theory on a two brane warped geometry model, we examine the possibility of "bouncing phenomena"on our visible brane. Our results reveal that the presence of a warped extra dimension lead to a non-singular bounce on the brane scale factor and hence can remove the "big-bang singularity". We also examine the possible parametric regions for which this bouncing is possible.

Extended matter bounce scenario in ghost free f(R,G) gravity compatible with GW170817

“…However the inequality in eqn. (59) is valid in the regime R > 0 i.e for entire cosmic time. This indicates that the linear order perturbation theory is valid in the entire range of cosmic time in the ghost free F (R, G) bouncing model.…”

A critical analysis of modulus stabilization in a higher dimensional F(R) gravity

“…( 31) denote the solutions of A(ϕ) and Ψ(ϕ) respectively, while the scalar field potential Ṽ (Ψ) is reconstructed in Eq. (32). It is important to note that γ < 0 is not allowed as this makes the bulk scalar field complex (Eq.…”

“…It was further shown that the radion kinetic term in such a scenario has a non-canonical coupling which exhibits a phantom character for certain values of the modulus. This makes it a suitable candidate to explain several early universe scenarios [30][31][32] (for bouncing cosmology and the violation of energy condition, see [33,34]). Particularly, in a FRW background the negative kinetic term of the radion leads to a violation of the null energy condition making it viable for a bouncing universe [31].…”

Antisymmetric Tensor Fields in Modified Gravity: A Summary

“…Here it may be mentioned that a bulk massive scalar field or higher curvature term(s) in the bulk can generate such stable modulus potential and thus may act as suitable stabilizing agent in the braneworld model [87,88]. This resulted into a large volume of work on phenomenological and cosmological implications of warped geometry model [89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106]. However in the context of cosmology in the braneworld scenario, one needs to incorporate dynamical stabilization mechanism of the interbrane separation.…”