59 citations · 299 across the 48 of their papers we have counts for
28 papers · 1 filter
Charged Klein-Gordon modes on an Ellis wormhole: magnetic confinement and conditional Heun solvability
Abdullah Guvendi, Omar Mustafa
We study charged Klein-Gordon modes on a -dimensional Ellis traversable wormhole in an external magnetic field defined as uniform in an auxiliary Euclidean embedding space.…
Optical and Thermodynamic Signatures of Lorentz Symmetry Breaking in Bumblebee AdS Black Holes
Behzad Eslam Panah, Abdullah Guvendi, Semra Gurtas Dogan +1
We investigate the impact of spontaneous Lorentz symmetry breaking on scalar wave propagation, null geodesics, and thermodynamic behavior of four-dimensional asymptotically AdS bla…
Spectroscopic structure of Non-Hermitian -Symmetric Klein--Gordon Fields in a Magnetized Cosmic String Spacetime
Omar Mustafa, Abdullah Guvendi
We investigate non-Hermitian -symmetric Klein--Gordon (KG) fields in a magnetized cosmic string spacetime. A complex non-minimal scalar interaction, $\mathcal{F}_μ=(0…
Thermodynamic Geometry, Heat Engines, and Topology of Sharma--Mittal ModMax-dRGT Black Holes
Hassan Hassanabadi, Abdullah Guvendi, Dhruba Jyoti Gogoi +2
We investigate the thermodynamic structure of charged AdS black holes in ModMax nonlinear electrodynamics coupled to dRGT-like massive gravity, incorporating Sharma--Mittal entropy…
Non-Hermitian symmetric Klein-Gordon fields in Lorentz-violating wormholes spacetime background
Omar Mustafa, Abdullah Guvendi
We investigate a -symmetric Klein--Gordon (KG) oscillator in a -dimensional Lorentz-violating (LV) traversable wormhole spacetime. The geometry is characterize…
Electromagnetic wave propagation in static black hole spacetimes: an effective refractive index description in Schwarzschild geometry
Abdullah Guvendi, Omar Mustafa Semra Gurtas Dogan, Hassan Hassanabadi
We investigate electromagnetic wave propagation in static, spherically symmetric black hole spacetimes using a covariant and gauge-invariant framework based on the established Maxw…
Lorentz-Violating Wormhole Optics
Omar Mustafa, Semra Gurtas Dogan, Abdulkerim Karabulut +1
We study massless spin-1 field propagation in a static, circularly symmetric -dimensional wormhole with spatial Lorentz-violating anisotropy characterized by the throat radi…
Wave Propagation and Effective Refraction in Lorentz-Violating Wormhole Geometries
Semra Gurtas Dogan, Omar Mustafa, Abdulkerim Karabulut +1
We study the propagation of massless scalar waves in static, spherically symmetric Lorentz-violating wormhole spacetimes within a geometric-optical framework. Starting from a gener…
Ergosphere Dynamics and Rotational Energy Extraction in Bumblebee Kerr-Newman-AdS Black Holes
H. Hassanabadi, A. Guvendi, F. Kafikang +2
We present a comprehensive analysis of the thermodynamic and optical properties of the Bumblebee Kerr-Newman-Anti-de Sitter (AdS) black hole, a rotating and charged configuration a…
Two-body Dirac equation in DSR: results for fermion-antifermion pairs
Nosratollah Jafari, Abdullah Guvendi
This study investigates a modified two-body Dirac equation in (2+1)-dimensional spacetime, inspired by Amelino-Camelia's doubly special relativity (DSR). We begin by deriving a cov…
Quantum confinement of scalar bosons in the Bonnor-Melvin spacetime: uniform magnetic field and rainbow gravity effects
Omar Mustafa, Abdullah Guvendi
We present an exact analytical study of Klein-Gordon (KG) scalar bosons and antibosons confined in the Bonnor-Melvin (BM) spacetime under a uniform magnetic field, incorporating ra…
Null geodesics and shadows of slowly rotating wormholes immersed in dark matter halos
Abdelghani Errehymy, Abdullah Guvendi, Semra Gurtas Dogan +1
We study slowly rotating traversable wormholes embedded in realistic galactic dark matter halos, including Navarro-Frenk-White (NFW), Bose-Einstein Condensate (Thomas-Fermi, TF), a…
Scalar-Wave Signatures of Wormholes in Dark Matter Halos
Abdullah Guvendi, Omar Mustafa, Semra Gurtas Dogan +2
We identify scalar-wave signatures of massless fields propagating in static, spherically symmetric wormholes embedded within realistic dark matter halos. Starting from a general li…
Charged particle dynamics in singular spacetimes: hydrogenic mapping and curvature-corrected thermodynamics
Abdullah Guvendi, Semra Gurtas Dogan, Omar Mustafa +1
We analyze the dynamics of charged test particles in a singular, horizonless spacetime arising as the massless limit of a charged wormhole in the Einstein--Maxwell--Scalar (EMS) fr…
Optics in spiral dislocation spacetime: Torsion as a geometric waveguide and frequency-filtering mechanism
Semra Gurtas Dogan, Omar Mustafa, Abdullah Guvendi +1
We present an exact analytical investigation of null trajectories and scalar wave propagation in a -dimensional spacetime containing a spiral dislocation-a topological defec…
Klein-Gordon particles in a nonuniform external magnetic field in Bonnor-Melvin rainbow gravity background
Omar Mustafa, Abdullah Guvendi
We investigate the effect of rainbow gravity on Klein-Gordon (KG) bosons in a quantized nonuniform magnetic field in the background of Bonnor-Melvin (BM) spacetime with a cosmologi…
On the Klein-Gordon bosonic fields in the Bonnor-Melvin spacetime with a cosmological constant in rainbow gravity: Bonnor-Melvin Domain Walls
Omar Mustafa, Abdullah Guvendi
We investigate the effect of rainbow gravity on Klein-Gordon (KG) bosons in the background of the magnetized Bonnor-Melvin (BM) spacetime with a cosmological constant. We first sho…
Vector bosons in the rotating frame of negative curvature wormholes
Abdullah Guvendi, Semra Gurtas Dogan
In this study, we investigate the relativistic dynamics of vector bosons within the context of rotating frames of negative curvature wormholes. We seek exact solutions for the full…
Coupled fermion-antifermion pairs within a traversable wormhole
Abdullah Guvendi, Semra Gurtas Dogan, Omar Mustafa
This study investigates the dynamics of fermion-antifermion pairs within a traversable wormhole spacetime by solving the two-body covariant Dirac equation with a position-dependent…
Probing quantum criticality near the BTZ black hole horizon: Insights from coupled fermion-antifermion pairs
Abdullah Guvendi, Omar Mustafa
In this study, we analytically examine the behavior of a fermion-antifermion pair near the horizon of a static BTZ black hole using a fully covariant two-body Dirac equation with a…
Photon Rings in Three-Dimensional Bonnor-Melvin Magnetic Spacetime
Abdullah Guvendi, Omar Mustafa
We present a rigorous analysis of the relativistic dynamics of vector bosons propagating in a -dimensional Bonnor-Melvin magnetic spacetime, characterized by an out-of-plane…
Geometric and wave optics in a BTZ optical metric-based wormhole
Semra Gurtas Dogan, Abdullah Guvendi, Omar Mustafa
We investigate the geometric and wave optical properties of a -dimensional ultra-static spacetime conformally related to the static BTZ black hole, characterized by constant…
Fermion-antifermion pairs in magnetized spacetime generated by a point source
A. Guvendi, O. Mustafa
In this research, we study fermion-antifermion pairs in a magnetized spacetime induced by a point-like source and characterized by an angular deficit parameter, \(α\). In the rest…
On the Klein-Gordon scalar field oscillators in a spacetime with spiral-like dislocations in external magnetic fields
O. Mustafa, A. Guvendi
We investigate the effects of two types of spiral dislocation (the distortion of the radial line, labeled as spiral dislocation I, and the distortion of a circle, labeled as spiral…