Results 51 to 60 of about 28,658 (246)
Shadows of Lorentzian traversable wormholes [PDF]
Classical and quantum gravity, 2021 The prospect of identifying wormholes by investigating the shadows of wormholes constitute a foremost source of insight into the evolution of compact objects and it is one of the essential problems in contemporary astrophysics.
F. Rahaman +4 more
semanticscholar +1 more source
Diving into traversable wormholes [PDF]
, 2017 We study various aspects of wormholes that are made traversable by an interaction beween the two asymptotic boundaries. We concentrate on the case of nearly‐ AdS2 gravity and discuss a very simple mechanical picture for the gravitational dynamics.
J. Maldacena, D. Stanford, Zhenbin Yang
semanticscholar +1 more source
Novel black-bounce spacetimes: Wormholes, regularity, energy conditions, and causal structure
, 2021 We develop a number of novel "black-bounce" spacetimes. These are specific regular black holes where the "area radius" always remains non-zero, thereby leading to a "throat" that is either timelike (corresponding to a traversable wormhole), spacelike ...
F. Lobo +4 more
semanticscholar +1 more source
Quasinormal modes of massive scalar fields in four-dimensional wormholes: Anomalous decay rate [PDF]
Physical Review D, 2022 In this work we consider a Generalized Bronnikov-Ellis wormhole and the tideless Morris-Thorne wormhole and we study the propagation of massive scalar fields.
P. González +3 more
semanticscholar +1 more source
A violation of global symmetries from replica wormholes and the fate of black hole remnants [PDF]
, 2020 We show that the presence of replica wormholes in the Euclidean path integral of gravity leads to a non-perturbative violation of charge conservation for any global symmetry present in the low-energy description of quantum gravity. Explicitly, we compute
Po-Shen Hsin +2 more
semanticscholar +1 more source
Fractal nature of acid-etched wormholes and the influence of acid type on wormholes
Petroleum Exploration and Development, 2012 Two-scale (Darcy scale and pore scale) continuum wormholing models are built to study the fractal nature of the acid-etched wormholes in acidizing carbonate reservoirs and the influence of acid type on the conditions for wormholes to form.
Ming LIU, Shicheng ZHANG, Jianye MOU
doaj +1 more source
Stability of thin-shell wormholes with spherical symmetry [PDF]
, 2008 In this article, the stability of a general class of spherically symmetric thin-shell wormholes is studied under perturbations preserving the symmetry. For this purpose, the equation of state at the throat is linearized around the static solutions.
D. Garfinkle +9 more
core +1 more source
Collapsing Wormholes Sustained by Dustlike Matter
Universe, 2020 It is well known that static wormhole configurations in general relativity (GR) are possible only if matter threading the wormhole throat is “exotic”—i.e., violates a number of energy conditions.
Pavel E. Kashargin, Sergey V. Sushkov
doaj +1 more source
On Possible Origin of an Artificial Wormhole
Universe, 2022 We assume the picture in which a vacuum is filled with virtual wormholes. The presence of external fields changes the distribution of virtual wormholes and, in principle, allows for the creation of a coherent structure that can work as an actual wormhole
Alexander A. Kirillov, Elena P. Savelova
doaj +1 more source
Entropy from the foam II [PDF]
, 2002 A simple model of spacetime foam, made by two different types of wormholes in a semiclassical approximation, is taken under examination: one type is a collection of $N_{w}$ Schwarzschild wormholes, while the other one is made by Schwarzschild-Anti-de ...
Bekenstein J. +14 more
core +2 more sources