arXiv subjects

Rimsha Babar

Publications and source records attributed to Rimsha Babar.

21 records · Page 2Linked to original sources

arXiv2019

The effect of the Brane-Dicke coupling parameter on weak gravitational lensing by wormholes and naked singularities

In this paper, we analyze the deflection angle of light by Brane-Dicke wormhole in the weak field limit approximation to find the effect of the Brane-Dicke coupling parameter on the weak gravitation lensing. For this purpose, we consider new geometric techniques, i.e., Gauss-Bonnet theorem and optical geometry in order to calculate the deflection angle. Furthermore, we verify our results by considering the most familiar geodesic technique. Moreover, we establish the quantum corrected metric of Brane-Dicke wormhole by replacing the classical geodesic with Bohmian trajectories, whose matter source and anisotropic pressure are influenced by Bohmian quantum effects and calculate its quantum corrected deflection angle. Then, we calculate the deflection angle by naked singularities and compare with the result of wormhole's. Such a novel lensing feature might serve as a way to detect wormholes, naked singularities and also the evidence of Brane-Dicke theory.

gr-qc↗

arXiv2018

Fermions Tunneling and Quantum Corrections for Quintessencial Kerr-Newman-AdS Black Hole

This paper is devoted to study charged fermion particles tunneling through the horizon of Kerr-Newman-AdS black hole surrounded by quintessence by using Hamilton-Jacobi ansatz. In our analysis, we investigate Hawking temperature as well as quantum corrected Hawking temperature on account of generalized uncertainty principle. Moreover, we discuss the effects of correction parameter $β$ on the corrected Hawking temperature $T_{e-H}$, graphically. We conclude that the temperature $T_{e-H}$ vanishes when $β=100$, whereas for $β<100$ and $β>100$, the temperature turns out to be positive and negative, respectively. We observe that the graphs of $T_{e-H}$ w.r.t. quintessence parameter $α$ exhibit behavior only for the particular ranges, i.e., $0<α<1/6$, charge $0<Q\leq1$ and rotation parameter $0<a\leq1$. For smaller and larger values of negative $Λ$, as horizon increases, the temperature decreases and increases, respectively.

hep-th↗

arXiv2018

Hawking radiation from cubic and quartic black holes via tunneling of GUP corrected scalar and fermion particles

We analyze the effect of the generalized uncertainty (GUP) principle on the Hawking radiation from the hairy black hole in U(1) gauge-invariant scalar-vector-tensor theory by utilizing the semiclassical Hamilton-Jacobi method. To do so, we evaluate the tunneling probabilities and Hawking temperature for scalar and fermion particles for the given spacetime of the black holes with cubic and quartic interactions. For this purpose, we utilize the modified Klein-Gordon equation for the Boson particles and then Dirac equations for the fermion particles, respectively. Next, we examine that the Hawking temperature of the black holes do not depend on the properties of tunneling particles. Moreover, we present the corrected Hawking temperature of scalar and fermion particles looks similar in both interactions, but there are different mass and momentum relationships for scalar and fermion particles in cubic and quartic interactions.

physics.gen-ph↗