Dynamical study of DBI-essence in loop quantum cosmology and brane world

Abstract

We have studied homogeneous isotropic FRW model having dynamical dark energy DBI-essence with scalar field. The existence of cosmological scaling solutions restricts the Lagrangian of the scalar field φ. Choosing p = Xg(Xe λφ ), where X = −g µν ∂µφ∂νφ/2 with g is any function of Xe λφ and defining some suitable transformations, we have constructed the dynamical system in different gravity: (i) Loop Quantum Cosmology (LQC), (ii) DGP BraneWorld and (iii) RS-II Brane World. We have investigated the stability of this dynamical system around the critical point for three gravity models and investigated the scalar field dominated attractor solution in support of accelerated universe. The role of physical parameters have also been shown graphically during accelerating phase of the universe.

Pilgrim dark energy in f(T,T G ) cosmology

“…In the present set up of cosmological scenario, this can be only prevented through phantom-like DE which contains enough repulsive force. Different attempts have been made in this way, e.g., reduction of BH mass though phantom accretion phenomenon (Babichev et al (2004); Martin-Moruno 2008;Jamil et al 2008;Babichev et al 2008;Jamil 2009;Jamil and Qadir 2011;Sharif and Abbas 2011;Bhadra and Debnath 2012;Sharif and Jawad 2013) and the avoidance of event horizon in the presence of phantom-like DE (Lobo 2005a(Lobo , 2005bSushkov 2005, Sharif andJawad 2014).…”

Viscous Chaplygin gas models as spherical top-hat collapsing fluids

“…Babichev et al [48] argued that black hole loses its mass during the accretion of phantom DE onto it. In order to support this idea, different attempts have been made in the presence of different phantom-like DE models such as CG, GCG, MCG, VMCG models etc [49,50]. Phantom-like behavior of CG is also more effective in the wormhole physics where the event horizon can be avoided due to its presence [51,52].…”

A complete cosmological scenario from $$f(R,T^{\phi })$$ f ( R , T ϕ )

“…Kerr BHs studies have been constantly seen in the literature (see, for instance, [72][73][74][75]). Since BHs are characterized by strong gravitational fields in quantum length scales, it is expected that their physics will bring about some new insights as regards quantum theories of gravity [76,77].…”