Wormholes supported by polytropic phantom energy

Jamil, Mubasher; Kuhfittig, Peter K. F.; Rahaman, Farook; Rakib, Sk. A.

doi:10.1140/epjc/s10052-010-1325-3

Cited by 98 publications

(52 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, gravitational lensing should give some opportunities for detecting wormholes [4,5]. General features of various wormholes were investigated in a great number of papers and we would like to refer the reader to only a recent few, where further references can be found [6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Passage of radiation through wormholes of arbitrary shape

Konoplya

Zhidenko

2010

Phys. Rev. D

View full text Add to dashboard Cite

We study quasinormal modes and scattering properties via calculation of the $S$-matrix for scalar and electromagnetic fields propagating in the background of spherically and axially symmetric, traversable Lorentzian wormholes of a generic shape. Such wormholes are described by the Morris-Thorne ansatz and its axially symmetric generalization. The properties of quasinormal ringing and scattering are shown to be determined by the behavior of the wormhole's shape function $b(r)$ and shift factor $\Phi(r)$ \emph{near the throat}. In particular, wormholes with the shape function $b(r)$, such that $b'(r) \approx 1$, have very long-lived quasinormal modes in the spectrum. We have proved that the axially symmetric traversable Lorentzian wormholes, unlike black holes and other compact rotating objects, do not allow for superradiance. As a by product we have shown that the 6th order WKB formula used for scattering problems of black or wormholes provides high accuracy and thus can be used for quite accurate calculations of the Hawking radiation processes around various black holes.Comment: 17 pages, the automatic procedure for calculations of the 6th order WKB quasinormal modes and reflection/transmission coefficients can be found on http://fma.if.usp.br/~konoplya/ .The procedure is authomatic and can be applied for various black and worm-holes; references adde

show abstract

Section: Introductionmentioning

confidence: 99%

Passage of radiation through wormholes of arbitrary shape

Konoplya

Zhidenko

2010

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…We get from Eqs. (13) and (14), that σ < 0 but σ + p ≥ 0 and σ + 2p ≥ 0, for all values of M and θ, which show that the shell contains matter, violates the weak energy condition and obeys the null and strong energy conditions which is shown in Fig. (4) …”

Section: Construction Of Thin-shell Wormholementioning

confidence: 77%

Stability of thin-shell wormholes from noncommutative BTZ black hole

Bhar

Banerjee

2015

Int. J. Mod. Phys. D

View full text Add to dashboard Cite

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 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 explored by the parameter β (speed of sound).

show abstract

“…By taking into account Eqs. (19), (21), we conclude that for ρ > 0 these requirements, in turn, lead to the following restriction on ω ef f in order to satisfy NEC,…”

Section: Wormholes With a Vanishing Redshift Functionmentioning

confidence: 91%

Asymptotically flat wormhole solutions with variable equation-of-state parameter

Parsaei

Rastgoo

2019

Phys. Rev. D

View full text Add to dashboard Cite

In this paper, we study exact wormhole solutions in the framework of general relativity with a general equation of state that reduced to a linear equation of state asymptotically. By considering a special shape function, we find classes of solutions which are asymptotically flat. We study the violation of NEC as the main ingredient in the wormhole physics. We investigate the possibility of finding wormhole solutions with asymptotically different state parameter. We show that in principle, wormhole with a vanishing redshift function and the selected shape function, cannot satisfy NEC at large distance from wormhole. We present solutions which have the positive total amount of mater in the "volume integral quantifier" method. For this class of solutions, fluid near the wormhole throat is in the phantom regime and at some r = r2, the phantom regime is connected to a dark energy regime. Thus, we need small amount of exotic matter to construct wormhole solutions.

show abstract

Wormholes supported by polytropic phantom energy

Cited by 98 publications

References 60 publications

Passage of radiation through wormholes of arbitrary shape

Passage of radiation through wormholes of arbitrary shape

Stability of thin-shell wormholes from noncommutative BTZ black hole

Asymptotically flat wormhole solutions with variable equation-of-state parameter

Contact Info

Product

Resources

About