scholarly journals Thin-shell wormholes ind-dimensional general relativity: Solutions, properties, and stability

2010 ◽  
Vol 82 (8) ◽  
Author(s):  
Gonçalo A. S. Dias ◽  
José P. S. Lemos
Keyword(s):  
General Relativity ◽  
Thin Shell ◽  
Thin Shell Wormholes

scholarly journals On the Stability of Thin-Shell Wormholes in Noncommutative Geometry

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Peter K. F. Kuhfittig
Keyword(s):  
General Relativity ◽  
Noncommutative Geometry ◽  
Special Class ◽  
Thin Shell ◽  
Thin Shell Wormholes ◽  
The Stability

This paper reexamines a special class of thin-shell wormholes that are unstable in general relativity in the framework of noncommutative geometry. It is shown that, as a consequence of the intrinsic uncertainty, these wormholes are stable to small linearized radial perturbations. Several different spacetimes are considered.

scholarly journals Perturbative dynamics of thin-shell wormholes beyond general relativity: An alternative approach

2017 ◽  
Vol 27 (01) ◽  
pp. 1750171 ◽  
Author(s):  
Emilio Rubín de Celis ◽  
Cecilia Tomasini ◽  
Claudio Simeone
Keyword(s):  
General Relativity ◽  
Thin Shell ◽  
Equations Of State ◽  
Thin Shells ◽  
Strong Restriction ◽  
Alternative Approach ◽  
Thin Shell Wormholes

Recent studies relating the approximations for the equations-of-state for thin shells and their consequent perturbative evolution are extended to thin-shell wormholes in theories beyond general relativity and more than four spacetime dimensions. The assumption of equations-of-state of the same form for static and slowly evolving shells appears as a strong restriction excluding the possibility of oscillatory evolutions. Then the new results considerably differ from previous ones obtained within the usual linearized approach.

Thin-shell wormholes in rainbow gravity

2018 ◽  
Vol 33 (09) ◽  
pp. 1850049 ◽  
Author(s):  
Z. Amirabi ◽  
M. Halilsoy ◽  
S. Habib Mazharimousavi
Keyword(s):  
General Relativity ◽  
Thin Shell ◽  
Planck Scale ◽  
High Energy ◽  
Exotic Matter ◽  
Thin Shell Wormholes ◽  
The Stability ◽  
Planck Energy ◽  
High Energy Particles ◽  
Modified Theory

At the Planck scale of length [Formula: see text] m where the energy is comparable with the Planck energy, the quantum gravity corrections to the classical background spacetime results in gravity’s rainbow or rainbow gravity. In this modified theory of gravity, geometry depends on the energy of the test particle used to probe the spacetime, such that in the low energy limit, it yields the standard general relativity. In this work, we study the thin-shell wormholes in the spherically symmetric rainbow gravity. We find the corresponding properties in terms of the rainbow functions which are essential in the rainbow gravity and the stability of such thin-shell wormholes are investigated. Particularly, it will be shown that there are exact solutions in which high energy particles crossing the throat will encounter less amount of total exotic matter. This may be used as an advantage over general relativity to reduce the amount of exotic matter.

scholarly journals TRAVERSABLE WORMHOLES IN A STRING CLOUD

2008 ◽  
Vol 17 (08) ◽  
pp. 1179-1196 ◽  
Author(s):  
MARTÍN G. RICHARTE ◽  
CLAUDIO SIMEONE
Keyword(s):  
Thin Shell ◽  
Dimensional Space ◽  
Space Time ◽  
Exotic Matter ◽  
Spherically Symmetric ◽  
Related Model ◽  
Traversable Wormholes ◽  
Dimensional Space Time ◽  
Thin Shell Wormholes ◽  
The Stability

We study spherically symmetric thin shell wormholes in a string cloud background in (3 + 1)-dimensional space–time. The amount of exotic matter required for the construction, the traversability and the stability of such wormholes under radial perturbations are analyzed as functions of the parameters of the model. In addition, in the appendices a nonperturbative approach to the dynamics and a possible extension of the analysis to a related model are briefly discussed.

scholarly journals Stability of thin-shell wormholes from noncommutative BTZ black hole

2015 ◽  
Vol 24 (05) ◽  
pp. 1550034 ◽  
Author(s):  
Piyali Bhar ◽  
Ayan Banerjee
Keyword(s):  
Black Hole ◽  
Thin Shell ◽  
Static Solution ◽  
Dynamical Analysis ◽  
Energy Conditions ◽  
Btz Black Hole ◽  
Wormhole Throat ◽  
Radial Perturbation ◽  
Thin Shell Wormholes ◽  
The Stability

In this paper, we construct thin-shell wormholes in (2 + 1)-dimensions from noncommutative BTZ black hole by applying the cut-and-paste procedure implemented by Visser. We calculate the surface stresses localized at the wormhole throat by using the Darmois–Israel formalism and we find that the wormholes are supported by matter violating the energy conditions. In order to explore the dynamical analysis of the wormhole throat, we consider that the matter at the shell is supported by dark energy equation of state (EoS) p = ωρ with ω < 0. The stability analysis is carried out of these wormholes to linearized spherically symmetric perturbations around static solutions. Preserving the symmetry we also consider the linearized radial perturbation around static solution to investigate the stability of wormholes which was explored by the parameter β (speed of sound).

Sign in / Sign up

Export Citation Format

Share Document