Effects of charge on the stability of thin-shell wormholes

Advances in High Energy Physics

Mumtaz²

2014

Self Cite

This paper is devoted to construct Schwarzschild-de Sitter and anti-de Sitter thin-shell wormholes by employing Visser’s cut and paste technique. The Darmois-Israel formalism is adopted to formulate the surface stresses of the shell. We analyze null and weak energy conditions as well as attractive and repulsive characteristics of thin-shell wormholes. We also explore stable and unstable solutions against linear perturbations by taking two different Chaplygin gas models for exotic matter. It is concluded that the stress-energy tensor components violate the null and weak energy conditions indicating the existence of exotic matter at the wormhole throat. Finally, we find unstable and stable configurations for the constructed thin-shell wormholes.

Section: Advances In High Energy Physicsmentioning

confidence: 99%

“…This EoS corresponds to GCG in the limit → 0 and the usual Chaplygin gas is recovered for = 0, = 1. Using (15) in 22, we formulate the following equation for static configuration:…”

Section: Schwarzschild-de Sitter and Anti-de Sitter Wormholesmentioning

confidence: 99%

Schwarzschild-de Sitter and Anti-de Sitter Thin-Shell Wormholes and Their Stability

Advances in High Energy Physics

Mumtaz²

2014

Self Cite

“…Sharif and collaborators discussed stability analysis of Reissner-Nordström [22] and Schwarzschild de Sitter as well as anti-de Sitter [23] thin-shell wormholes in the vicinity of generalized cosmic Chaplygin gas (GCCG) and modified cosmic Chaplygin gas (MCCG). Some physical properties of spherical traversable wormholes [24] as well as stability of cylindrical thin-shell wormholes [25,26] have been studied in the context of GCCG, MCCG and Van der Waals (VDW) quintessence EoS. Recently, Halilsoy et al [27] discussed stability of thin-shell wormholes from regular Hayward BH by taking linear, logarithmic and Chaplygin gas models and found stable solutions for increasing values of Hayward parameter.…”

Section: Introductionmentioning

confidence: 99%

Stability of the Regular Hayward Thin-Shell Wormholes

Advances in High Energy Physics

Mumtaz

2016

Self Cite

The aim of this paper is to construct regular Hayward thin-shell wormholes and analyze their stability. We adopt Israel formalism to calculate surface stresses of the shell and check the null and weak energy conditions for the constructed wormholes. It is found that the stress-energy tensor components violate the null and weak energy conditions leading to the presence of exotic matter at the throat. We analyze the attractive and repulsive characteristics of wormholes corresponding to a r > 0 and a r < 0, respectively. We also explore stability conditions for the existence of traversable thin-shell wormholes with arbitrarily small amount of fluids describing cosmic expansion. We find that the spacetime has non-physical regions which give rise to event horizon for 0 < a 0 < 2.8 and the wormhole becomes nontraversable producing a black hole. The non-physical region in the wormhole configuration decreases gradually and vanishes for the Hayward parameter l = 0.9. It is concluded that the Hayward and Van der Waals quintessence parameters increase the stability of thin-shell wormholes.

“…Eiroa (2009) discussed the dynamics of spherical thin-shell wormholes by taking generalized Chaplygin gas (GCG). Sharif and collaborators (Sharif and Azam 2013a;Sharif and Mumtaz 2014b, 2015, 2016a investigated both stable and unstable thin-shell wormholes in the vicinity of Chaplygin gas (CG) models and Van der Waals quintessence. Mazharimousavi and Halilsoy (2014) studied the effects of angular momentum on the stability of counterrotating thin-shell wormholes by assuming linear gas EoS and found stable wormhole solutions.…”

Section: Introductionmentioning

confidence: 99%

Influence of nonlinear electrodynamics on stability of thin-shell wormholes

Mumtaz

2016

Astrophys Space Sci

Self Cite

The aim of this paper is to discuss stability of regular thin-shell wormholes coupled with non-linear electrodynamics and cosmological constant. The surface stresses are formulated by using Lanczos equations. We examine attractive and repulsive behavior of these constructed wormholes corresponding to outward and inward-directed acceleration components, respectively. We also investigate stability conditions for the existence of traversable thin-shell wormholes with arbitrarily small amount of different fluids as exotic matter. We consider linear, logarithmic and Chaplygin gas models and find that a modified generalized Chaplygin gas model provides maximum viable regions for stability of the respective thin-shell wormholes. It is found that formation of stable regions for ABGB thin-shell wormholes highly depends on the physically acceptable range of charge and other parameters.