Results 31 to 40 of about 22,622 (206)
Transmission of low-energy scalar waves through a traversable wormhole
European Physical Journal C: Particles and Fields, 2020 We study the scattering of low-energy massless and massive minimally coupled scalar fields by an asymptotically flat traversable wormhole. We provide a comprehensive treatment of this problem offering analytic expressions for the transmission and ...
Bahareh Azad +2 more
doaj +1 more source
A cluster-based approach against wormhole attacks in MANETs among smart grid
Frontiers in Energy Research, 2022 Mobile ad hoc networks in smart grid become more and more popular and significant. However, the deployment scenarios, the functionality requirements and the limited capabilities make them vulnerable to a large group of attacks, e.g., wormhole attacks. In
Weijie Liu +3 more
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Geometric structure of the generic static traversable wormhole throat [PDF]
, 1997 Traversable wormholes have traditionally been viewed as intrinsically topological entities in some multiply connected spacetime. Here, we show that topology is too limited a tool to accurately characterize a generic traversable wormhole: in general one ...
C. W. Misner +14 more
core +2 more sources
Wormholes without exotic matter in nonminimal torsion-matter coupling f(T) gravity
上海师范大学学报. 自然科学版, 2023 Wormholes are hypothetical tunnels that connect remote parts of spacetime. In General Relativity, wormholes are threaded by exotic matter that violates the energy conditions.
YANG Jing, LIN Ruihui, ZHAI Xianghua
doaj +1 more source
Brans-Dicke Wormhole Revisited
, 2009 A basic constraint to be satisfied by Brans class I solution for being a traversible wormhole is derived. It is argued that the solution could be a wormhole analogue of the Horowitz-Ross naked black hole.
Amrita Bhattacharya +9 more
core +1 more source
Wormhole cosmic censorship [PDF]
General Relativity and Gravitation, 2016 We analyze the properties of a Kerr-like wormhole supported by phantom matter, which is an exact solution of the Einstein-phantom field equations. It is shown that the solution has a naked ring singularity which is unreachable to null geodesics falling freely from the outside.
Matos, Tonatiuh +2 more
openaire +3 more sources
Research on wormhole attacks in wireless mesh networks
Tongxin xuebao, 2011 In order to detect the wormhole attacks effectively in wireless mesh network,a wormhole attack model ac-cording to the MR-LQSR（multi-radio link-quality source routing） protocol proposed by Microsoft was presented.Then,the characteristics of wireless mesh
FU Ying-fang1 +3 more
doaj +2 more sources
Negative modes in the four-dimensional stringy wormholes [PDF]
, 1997 We study the Giddings-Strominger wormholes in string theories. We found negative modes among O(4)-symmetric fluctuations about the non-singular wormhole background.
A. A. Tseytlin +25 more
core +4 more sources
International Journal of Modern Physics A, 2009 We investigate if theories yielding bouncing cosmological models also generate wormhole solutions. We show that two of them present sensible traversable static wormhole solutions, while for the third possibility such solutions are absent.
Pinto-Neto, N. +2 more
openaire +3 more sources