8 papers · 1 filter
Elementary-Symmetric Ricci Gravity: Metric Formulation
Xingpao Suo, Dianxu Ma, Yuqiong Shan +1
We investigate a four-dimensional metric theory of gravity whose Lagrangian is a linear combination of the elementary symmetric polynomials of the Ricci tensor. We derive the field…
Coherent quantum state corrections in RN--black holes: Photon dynamics, shadow casts, and energy backreaction
A. Errehymy, Y. Khedif, M. Daoud +4
We revisit the Reissner-Nordström (RN) geometry within the coherent quantum black hole framework, introducing a version that remains well-behaved at short distances while preservin…
Joint Constraints on Quantum Oppenheimer--Snyder Black Holes from High-Frequency Quasi-Periodic Oscillations in X-ray Binary Systems and the S2 Star Orbit
A. Errehymy, Y. Khedif, M. Daoud +4
We study a quantum-corrected version of the Oppenheimer--Snyder (OS) spacetime in which classical collapse is modified by a single effective-parameter \(α\), representing small-qua…
Observational Constraints on Kazakov-Solodukhin Quantum-Deformed Black Holes from M87 and Sgr A Shadows
A. Errehymy, Y. Khedif, M. Daoud +4
We explore the Kazakov-Solodukhin quantum-deformed black hole spacetime, characterized by a single deformation parameter \( η\) that encodes quantum corrections to the classical Sc…
Slowly rotating traversable wormholes supported by radially varying string-fluid matter: From regular geometries to photon trajectories
A. Errehymy, B. Turimov, M. A. Khan +3
This work investigates slowly rotating traversable wormholes supported by string fluids whose properties vary with distance from the throat. This radial variation allows the matter…
Dymnikova-Schwinger quantum-corrected slowly rotating wormholes: Photon and spinning particle dynamics
A. Errehymy, Y. Khedif, M. Daoud +3
This work studies light propagation near slowly rotating traversable wormholes supported by a quantum-inspired matter source. The model is based on the Dymnikova density profile, v…
Event Horizon Telescope Observational Constraints on Dymnikova-Type Non-Singular Black Holes in Higher Dimensions
A. Errehymy, Y. Khedif, M. Daoud +3
Black holes are among the most compelling predictions of general relativity (GR) and are now strongly supported by observations from gravitational-wave detectors and the Event Hori…
Quantum corrections to Dymnikova-Schwinger black holes in Einstein-Gauss-Bonnet gravity
A. Errehymy, Y. Khedif, M. Daoud +3
This work investigates black holes within a modified framework of gravity that incorporates quantum-inspired corrections and a fundamental minimal length scale. By integrating Eins…