Results 31 to 40 of about 5,317 (165)
Introduction--Americanist and Planetary Wormholes: The Insect and America in the World
Journal of Transnational American Studies, 2022 Reprise Editor's ...
Brian Russell Roberts
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Radial perturbations of charged wormholes
Physics Letters BEllis-Bronnikov wormholes suffer from an unstable radial mode. Here we investigate the evolution of the unstable mode(s) for charged wormholes. We show that the instability remains in the presence of charge, but exhibits a very fast decrease to zero.
Jose Luis Blázquez-Salcedo +4 more
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Wormholes in Euclidean quantum gravity [PDF]
, 1992 I present a summary of the developments in wormhole physics. I then investigate the (Euclidean time) decay of axion charge that occurs in a 3-sphere of constant volume when there is a small charge violating operator perturbing the Hamiltonian.
Ridgway, Stuart Alexander
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European Physical Journal C: Particles and FieldsThis work is devoted to exploring the formation and stability of thin-shell wormholes developed through the two similar copies of black holes bounded by the pseudo-isothermal dark matter halo. It is found that the horizon radius of a black hole decreases
Faisal Javed +3 more
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Establishing Shape Correspondences: A Survey
Computer Graphics Forum, EarlyView.Abstract Shape correspondence between surfaces in 3D is a central problem in geometry processing, concerned with establishing meaningful relations between surfaces. While all correspondence problems share this goal, specific formulations can differ significantly: Downstream applications require certain properties that correspondences must satisfy ...
A. Heuschling, H. Meinhold, L. Kobbelt
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Evolving wormhole geometry from dark matter energy density
European Physical Journal C: Particles and FieldsWe analyse traversable wormholes defined by the dynamic line elements that asymptotically approach Friedmann–Robertson–Walker (FRW) universe. These dynamical wormholes is supported by the galactic dark matter as well as perfect isotropic fluid.
Farook Rahaman, Bikramarka S. Choudhury
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Search for Wormhole Candidates: Accreting Wormholes with Monopole Magnetic Fields
UniverseThe existence of even the simplest magnetized wormholes may lead to observable consequences. In the case where both the wormhole and the magnetic field around its mouths are static and spherically symmetric, and gas in the region near the wormhole falls ...
Mikhail Piotrovich +3 more
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Is Time Travel Possible? Accidental Signs as Sociolinguistic “Wormholes”
International Journal of Applied Linguistics, EarlyView.ABSTRACT Sociolinguistics primarily focuses on deliberately staged public signs, while relatively less attention has been given to ephemeral and non‐deliberate signs in urban environments. This study investigates “ accidental signs,” which are hidden historical texts suddenly exposed by unpredictable events.
Ge SONG (宋歌)
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Unimodular Gravity Traversable Wormholes [PDF]
, 2023 Wormholes are outstanding solutions of Einstein's General Relativity. They were worked out in the late 1980's by Morris and Thorne, who have figured out a recipe that wormholes must obey in order to be traversable, that is, safely crossed by travelers. A
Moraes, P. H. R. S. +2 more
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Now, Again and Again: The Metaphysics of Many Presents
Pacific Philosophical Quarterly, EarlyView.ABSTRACT This paper discusses whether there can be multiple present moments. After presenting some reasons for thinking that the question is worthwhile, I challenge several objections to its possibility: worries about the exclusivity of tense; the nature of change, tense logic and semantics; and the apparent tension between multiple presents and an ...
Nikk Effingham
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