output
19992026
most citedHorizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A

753 citations

researchers with a paper here
collaborating institutions

592 papers

gr-qc2026

Thermal Quantum Fluctuations in Einstein-Nonlinear Maxwell-Yukawa Black Hole

M. Mangut

This study investigates an Einstein-nonlinear electrodynamic black hole generated by a Yukawa-screened electromagnetic potential and examines its thermal properties through the cal…

gr-qc2026

Redshift Spectroscopy as a Probe of Regular Black Holes, Black Bounces, and Scalar-Hair Compact Objects

Ali Övgün, Reggie C. Pantig, Joel Saavedra

Motivated by [Phys. Rev. D. 107, 064019 (2023)], we develop a unified and model-independent framework for the spectroscopy of photon frequency shifts in generic static, spherically…

cs.FL2026

Reverse Post Correspondence Problem and Undecidability of String Assembly Systems

Benedek Nagy

The Post Correspondence Problem is as follows: having a set of dominoes, is there any (maybe repeating) sequence of them such that the words formed by the upper parts and the lower…

gr-qc2026

An obstruction and residual-completion theory for Newman--Janis deformations

Reggie C. Pantig, Ali Övgün

We formulate an obstruction and residual-completion theory for Newman-Janis-type deformations of black hole seeds, where Newman-Janis-type includes both the original complex-coordi…

gr-qc2026

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…

gr-qc2026

Systematic Light Propagation Bias from the Heliosphere and Its Impact on the Hubble Tension

Behnam Pourhassan, İzzet Sakallı, Sudhaker Upadhyay +1

The Hubble tension (HT) represents one of the most significant discrepancies in modern cosmology, with local distance measurements yielding km/s/Mpc while cosm…