output
20212026
most citedQuasiperiodic oscillations, weak field lensing and shadow cast around black holes in Symmergent gravity

73 citations

Showing 2026Show all

15 papers · 1 filter

nucl-th2026

Lorentz-Covariant Spectral Bounds from Thermal Quantum Field Theory

Alisher Sanetullaev, Sarbinaz Bazarbaeva, Marhabo Beymamatova +1

We derive rigorous Lorentz-covariant bounds on relaxation spectra directly from the analytic structure of retarded Green's functions in thermal quantum field theory, using only cau…

nucl-th2026

Lorentz-Covariant Spectral Bounds from Thermal Quantum Field Theory: Retarded Green's Functions, Kubo Relations, and Holographic Constraints

Alisher Sanetullaev, Sarbinaz Bazarbaeva, Marhabo Beymamatova +1

We extend the recently established framework of Lorentz-covariant relaxation bounds from linearized classical kinetic and rheological theories to the full quantum setting of therma…

gr-qc2026

Acausal exact vacuum solutions in nonlocal gravity

Zhe Zhao, Leonardo Modesto, Cosimo Bambi

Nonlocal gravity is a promising super-renormalizable or finite quantum gravity theory consistent with unitarity. In this paper, we focus on the classical equations of motion and ex…

gr-qc2026

Grey-Body Factors and Thermodynamics of Asymptotically de Sitter Black Holes in Generalized Proca Theory

Bekir Can Lütfüoğlu, Javlon Rayimbaev, Nuriddin Kurbonov +2

Generalized Proca theory supplements gravity with a massive vector field whose derivative self-interactions can support black holes carrying primary vector hair. In the asymptotica…

physics.ed-ph2026

A Pedagogical MKS-based Electromagnetic Unit Convention with

Alisher Sanetullaev

We propose a pedagogical, rationalized MKS-based convention for electromagnetic quantities designed to reduce cognitive load in undergraduate undergraduate electromagnetism. By set…

gr-qc2026★ 4 cited

A First-Order Eikonal Framework for Quasinormal Modes, Shadows, Strong Lensing, and Grey-Body Factors in a Scalarized Black-Hole Metric

Bekir Can Lütfüoğlu, Javlon Rayimbaev, Sardor Murodov +2

We construct an analytic geodesic-optics description of quasinormal ringing, black-hole shadows, strong lensing, and grey-body factors for the static spherical metric introduced in…

gr-qc2026

Improved Constraints on Non-Kerr Deviations from Binary Black Hole Inspirals Using GWTC-4 Data

Debtroy Das, Swarnim Shashank, Cosimo Bambi

Gravitational wave (GW) observations of binary black hole (BBH) mergers provide a unique opportunity to probe the nature of spacetime in the strong-field and dynamical regime. We p…

quant-ph2026

Hybrid Photonic Quantum Reservoir Computing for High-Dimensional Financial Surface Prediction

Fyodor Amanov, Azamkhon Azamov

We propose a hybrid photonic quantum reservoir computing (QRC) framework for swaption surface prediction. The pipeline compresses 224-dimensional surfaces to a 20-dimensional laten…

gr-qc2026

Josephson Effects in Slowly Rotating Spacetimes

Nurmukhammed Aytimbetov, Reggie C. Pantig, Ali Övgün +2

We investigate Josephson phenomena in a slowly rotating stationary spacetime, emphasizing the distinct roles of gravitational redshift and rotational frame dragging motivated by [1…

gr-qc2026★ 2 cited

Ringing Regularity: Gravitational Perturbations and Quasinormal Modes of Einasto-Supported Black Holes

Bekir Can Lütfüoğlu, Javlon Rayimbaev, Sardor Murodov +2

We investigate axial gravitational perturbations and quasinormal modes of regular black holes supported by an Einasto distribution of matter. Halo matter not only removes the centr…

gr-qc2026★ 1 cited

Horizon-Brightened Acceleration Radiation and Optical Signatures of Generic Regular Black Holes from Nonlinear Electrodynamics

Uktamjon Uktamov, Ali Övgün, Reggie C. Pantig +1

We investigate horizon-brightened acceleration radiation (HBAR) and optical signatures for a broad class of regular black holes sourced by nonlinear electrodynamics. The spacetimes…

gr-qc2026

Testing non-circular black hole spacetime with X-ray reflection

Leda Gao, Swarnim Shashank, Cosimo Bambi

X-ray reflection spectroscopy is a powerful tool for testing the Kerr hypothesis and probing the strong gravity regime around accreting black holes. Most tests of General Relativit…

gr-qc2026★ 3 cited

Two types of quasinormal modes of Casadio-Fabbri-Mazzacurati brane-world black holes

Bekir Can Lütfüoğlu, Sardor Murodov, Mardon Abdullaev +3

Using the convergent Leaver method, we investigate the quasinormal modes of a massive scalar field propagating in the background of the Casadio--Fabbri--Mazzacurati (CFM) brane-wor…

gr-qc2026★ 1 cited

Dynamical response of twin stars to perturbations

Shamim Haque, Luciano Rezzolla, Ritam Mallick

If a strong first-order phase transition takes place at sufficiently high rest-mass densities in the equation of state (EOS) modelling compact stars, a new branch will appear in th…

astro-ph.HE2026

Searching for Isolated Black Hole Candidates within 15 pc of the Solar System in Gaia DR3

Abdurakhmon Nosirov, Cosimo Bambi, Leda Gao +4

Theoretical models predict that the Galaxy hosts - black holes formed from the complete gravitational collapse of heavy stars and that most of these black holes are iso…