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Traversable Wormholes in General Relativity
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In [J. Blazquez-Salcedo, C. Knoll, E. Radu, Phys. Rev. Lett. 126 (2021) no.10, 101102] asymptotically flat traversable wormhole solutions were obtained in the Einstein-Dirac-Maxwell theory without using phantom matter. The normalizable numerical solutions found therein require a peculiar behavior at the throat: the mirror symmetry relatively the throat leads to the nonsmoothness of gravitational and matter fields. In particular, one must postulate changing of the sign of the fermionic charge density at the throat, requiring coexistence of particle and antiparticles without annihilation and posing a membrane of matter at the throat with specific properties. Apparently this kind of configuration could not exist in nature. We show that there are wormhole solutions, which are asymmetric relative the throat and endowed by smooth gravitational and matter fields, thereby being free from all the above problems. This indicates that such wormhole configurations could also be supported in a realistic scenario.
Forward citations
Cited by 5 Pith papers
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Obstructions to Traversable Wormholes in Einstein-Dirac Theory
Traversable wormholes do not appear to exist as static, spherically symmetric solutions of the Einstein-Dirac system sourced by normalizable positive-frequency Dirac fields.
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Confined test particles near a wormhole throat show high-energy chaos coexisting with surviving KAM tori, in contrast to horizon-driven chaos in black holes.
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Dynamical evolution and stability of quantum corrected Schwarzschild black holes in semiclassical gravity
The static quantum corrected Schwarzschild wormhole is dynamically unstable: it expands in vacuum and collapses into an evaporating black hole when a small amount of matter is present.
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Nonlocal gravity in a proper tetrad frame: traversable wormholes
Static, spherically symmetric traversable wormholes are built in revised Deser-Woodard nonlocal gravity by reconstructing the theory's distortion function from chosen wormhole metrics.
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Study of Wormhole in $f(Q)$ gravity with some dark energy models
Three wormhole models are constructed in linear f(Q) gravity using varying Chaplygin, generalized Chaplygin, and varying barotropic equations of state, all of which violate the null energy condition at the throat.
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