Results 1 to 10 of about 22,622 (206)

Preparation and Performance Study of Microemulsion Acid for Comprehensive Plugging Removal in Carbonate Reservoir [PDF]

open access: yesMolecules, 2023
Matrix acidification is one of the most effective stimulations to dissolve scales and remove damage in carbonate reservoirs. However, existing acid systems are difficult to dissolve organic and inorganic scales simultaneously, and complex multi-stage ...
Yunjin Wang   +4 more
doaj   +2 more sources

Complementarity in Wormhole Chromodynamics [PDF]

open access: yesPhysics Letters B, 1993
The electric charge of a wormhole mouth and the magnetic flux ``linked'' by the wormhole are non-commuting observables, and so cannot be simultaneously diagonalized.
Lee, Kai-Ming   +2 more
core   +6 more sources

Topologically Protected Wormholes in Type-III Weyl Semimetal Co3In2X2 (X = S, Se)

open access: yesCondensed Matter, 2021
The observation of wormholes has proven to be difficult in the field of astrophysics. However, with the discovery of novel topological quantum materials, it is possible to observe astrophysical and particle physics effects in condensed matter physics. It
Christopher Sims
doaj   +1 more source

BTZ Black-Bounce to Traversable Wormhole

open access: yesUniverse, 2022
In this paper, we study the charged and uncharged BTZ counterpart of the black-bounce proposed by Simpson and Visser recently. For the uncharged case, we find that the temperature is not modified by the bounce parameter.
Job Furtado, Geová Alencar
doaj   +1 more source

Black Holes and Wormholes in Extended Gravity

open access: yesUniverse, 2020
We discuss black hole type solutions and wormhole type ones in the effective gravity models. Such models appear during the attempts to construct the quantum theory of gravity.
Stanislav Alexeyev, Maxim Sendyuk
doaj   +1 more source

Investigation of traversable wormhole solutions in modified $$f(R)$$ f ( R ) gravity with scalar potential

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
The objective of this manuscript is to investigate the traversable wormhole solutions in the background of the $$f(R, \phi )$$ f ( R , ϕ ) theory of gravity, where R is the Ricci scalar and $$\phi $$ ϕ is the scalar potential respectively.
Adnan Malik   +4 more
doaj   +1 more source

Simulated Investigation in Wormhole Expansion Law of Gelling Acid Etching and Its Influencing Factors in Deep Carbonate Reservoirs

open access: yesGels, 2022
Acidizing with gelling acid is the key technology in developing a carbonate reservoir successfully. It is difficult for the laboratory to carry out the radial displacement experiment with a large rock core.
Mingwei Wang, Wen Zhou, Song Li, Wen Wu
doaj   +1 more source

Possibility of traversable wormhole formation in the dark matter halo with istropic pressure

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
We explore the possibility of traversable wormhole formation in the dark matter halos. We obtain the exact solutions of the spherical symmetry traversable wormhole with isotropic pressure condition, based on the Navarro–Frenk–White (NFW), Thomas–Fermi ...
Zhaoyi Xu   +3 more
doaj   +1 more source

Epicyclic Oscillations around Simpson–Visser Regular Black Holes and Wormholes

open access: yesUniverse, 2021
We study epicyclic oscillatory motion along circular geodesics of the Simpson–Visser meta-geometry describing in a unique way regular black-bounce black holes and reflection-symmetric wormholes by using a length parameter l.
Zdeněk Stuchlík, Jaroslav Vrba
doaj   +1 more source

Passage of radiation through wormholes [PDF]

open access: yes, 2009
We investigate numerically the process of the passage of a radiation pulse through a wormhole and the subsequent evolution of the wormhole that is caused by the gravitational action of this pulse. The initial static wormhole is modeled by the spherically
Doroshkevich, Andrey   +3 more
core   +1 more source

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