Hassan Alshal
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View article: Linearized Stability of Harada Thin-Shell Wormholes
Linearized Stability of Harada Thin-Shell Wormholes Open
Using Darmois-Israel-Sen junction conditions, and with help of Visser's cut-and-paste method, we study the dynamics of thin-shell wormholes that are made of two conformally Killing gravity (a.k.a Harada gravity) black holes. We check the e…
View article: Newtonian Gravity on an N-Sphere
Newtonian Gravity on an N-Sphere Open
We consider some elementary features of Newtonian gravity, or electrostatics, as defined on an N -sphere.In particular, we present and discuss "the shell theorem" for this system.
View article: Gravitational observations and LQGUP
Gravitational observations and LQGUP Open
Motivated by recent works, we employ the bounds on the dimensionless quantum-gravity parameter obtained from six solar system-based gravitational tests in order to obtain bounds on the dimensionless parameter of the generalized uncertainty…
View article: Einstein's equations and the pseudo-entropy of pseudo-Riemannian information manifolds
Einstein's equations and the pseudo-entropy of pseudo-Riemannian information manifolds Open
Motivated by the corrected form of the entropy-area law, and with the help of von Neumann entropy of quantum matter, we construct an emergent spacetime by the virtue of the geometric language of statistical information manifolds. We discus…
View article: Unitary symmetries in wormhole geometry and its thermodynamics
Unitary symmetries in wormhole geometry and its thermodynamics Open
View article: Newtonian Gravity on an N-Sphere
Newtonian Gravity on an N-Sphere Open
We consider some elementary features of Newtonian gravity, or electrostatics, as defined on an N-sphere. In particular, we present and discuss "the shell theorem" for this system.
View article: Gravitational Observations and LQGUP
Gravitational Observations and LQGUP Open
Motivated by recent works, we employ the bounds on the dimensionless quantum-gravity parameter obtained from six gravitational tests in order to obtain bounds on the dimensionless parameter of the generalized uncertainty principle with lin…
View article: Dual fields of massive/massless gravitons in IR/UV completions
Dual fields of massive/massless gravitons in IR/UV completions Open
In the holographic picture, the Brout-Englert-Higgs (BEH) mechanism in [Formula: see text]-dimensional Yang–Mills theories is conjectured to provide a Higgs-like mechanism for gravity in [Formula: see text] dimensions, resulting in massive…
View article: On Enceladian Fields
On Enceladian Fields Open
We fantasize about an alternative history for theories of electromagnetism and gravitation.
View article: Linearized stability of Bardeen-de Sitter thin-shell wormholes
Linearized stability of Bardeen-de Sitter thin-shell wormholes Open
A thin-shell wormhole is crafted by the cut-and-paste method of two Bardeen\nde-Sitter black holes using Darmois-Israel formalism. Energy conditions are\nconsidered for different values of magnetic charge while both mass and\ncosmological …
View article: Linearized Stability of Bardeen de-Sitter Thin-Shell Wormholes
Linearized Stability of Bardeen de-Sitter Thin-Shell Wormholes Open
A thin-shell wormhole is crafted by the cut-and-paste method of two Bardeen de-Sitter black holes using Darmois-Israel formalism. Energy conditions are considered for different values of magnetic charge while both mass and cosmological con…
View article: Massive dual spin 2 revisited
Massive dual spin 2 revisited Open
We reconsider a massive dual spin 2 field theory in four spacetime\ndimensions. We obtain the Lagrangian that describes the lowest order coupling\nof the field to the four-dimensional curl of its own energy-momentum tensor. We\nthen find s…
View article: Linearized Stability of Bardeen de-Sitter Thin-Shell Wormholes
Linearized Stability of Bardeen de-Sitter Thin-Shell Wormholes Open
A thin-shell wormhole is crafted by the cut-and-paste method of two Bardeen de-Sitter black holes using Darmois-Israel formalism. Dynamics and stability of the wormhole is also studied around the static solutions of the linearized radial p…
View article: Massive dual gravity in N spacetime dimensions
Massive dual gravity in N spacetime dimensions Open
A bstract We describe a field theory for “massive dual gravity” in N spacetime dimensions. We obtain a Lagrangian that gives the lowest order coupling of the field to the N -dimensional curl of its own energy-momentum tensor. We then brief…
View article: Massive Dual Spin 2
Massive Dual Spin 2 Open
We reconsider a massive dual spin 2 field theory in four spacetime dimensions. We obtain the Lagrangian that describes the lowest order coupling of the field to the four-dimensional curl of its own energy-momentum tensor. We then find some…
View article: Green Functions, Sommerfeld Images, and Wormholes
Green Functions, Sommerfeld Images, and Wormholes Open
Electrostatic Green functions for grounded equipotential circular and elliptical rings, and grounded hyperspheres in n-dimension electrostatics, are constructed using Sommerfeld's method. These electrostatic systems are treated geometrical…
View article: Massless charged particles, naked singularity, and GUP in Reissner-Nordström-de Sitter-like spacetime
Massless charged particles, naked singularity, and GUP in Reissner-Nordström-de Sitter-like spacetime Open
Motivated by the endeavors of Li Xiang and You-Gen Shen on naked\nsingularities, we investigate the validity of the cosmic censorship conjecture\nin the context of generalized uncertainty principle. In particular, upon\nconsidering both li…
View article: Grounded hyperspheres as squashed wormholes
Grounded hyperspheres as squashed wormholes Open
We compute exterior Green functions for equipotential, grounded hyperspheres in N-dimensional electrostatics by squashing Riemannian wormholes, where an image charge is placed in the branch of the wormhole opposite the branch containing th…
View article: The conducting ring viewed as a wormhole
The conducting ring viewed as a wormhole Open
We compute the exterior Green function for a grounded equi-potential circular ring in two-dimensional electrostatics by treating the system geometrically as a "squashed wormhole" with an image charge located in a novel but obvious position…
View article: Image Charges Re-Imagined
Image Charges Re-Imagined Open
We discuss the grounded, equipotential ellipse in two-dimensional electrostatics to illustrate different ways of extending the domain of the potential and placing image charges such that homogeneous boundary conditions are satisfied. In pa…