⚛️ Category

gr-qc

3773 papers

Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.

At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.

⚛️ general relativity

Modified Black Hole Physics in Quantum Gravity with Quintessence and Topological Defects

This paper investigates the geometric, dynamical, and thermodynamic properties of a static, spherically symmetric quantum Oppenheimer-Snyder black hole surrounded by quintessence and a cloud of strings, deriving its horizon structure, photon sphere, geodesic stability, quasinormal modes, and thermodynamic behavior to demonstrate that the model remains stable and free of negative-temperature phases despite the non-asymptotically flat geometry.

Faizuddin Ahmed, Ahmad Al-Badawi, żzzet Sakallı2026-09-04
🔭 astrophysics

The influence of standard relativistic effects on Gaia-like astrometric catalogs

This paper investigates the impact of unaccounted relativistic effects on Gaia-like astrometric parameters by combining analytical estimates with AGISLab simulations, demonstrating that averaging over numerous observations drastically reduces parameter errors compared to individual observation effects, thereby suggesting potential simplifications for future high-accuracy astrometric models.

Gabriel Rodríguez-Moris, Sergei A. Klioner2026-09-04
⚛️ general relativity

Tidally-enhanced resonances in extreme-mass-ratio inspirals: A tertiary path to chaos

This paper investigates how external tidal fields in extreme-mass-ratio inspirals break spacetime axisymmetry to induce chaotic dynamics and tidal resonances, characterized by distinct plateaus in frequency ratios and phase-locked action-angle variables, which have significant implications for gravitational-wave inference in active galactic nuclei.

Kyriakos Destounis, Takuya Katagiri, Sajal Mukherjee, Kostas D. Kokkotas2026-09-04
⚛️ general relativity

Excitation factors and exceptional points of Kerr-de Sitter quasinormal modes

This paper computes the excitation factors of Kerr-de Sitter black hole quasinormal modes using Heun and hypergeometric function techniques, revealing that near exceptional points where mode frequencies coincide, the modes exhibit a hysteresis phenomenon characterized by significantly enhanced excitation factors with nearly opposite phases.

Dario Rossi, Naritaka Oshita, Leonardo Gualtieri, Emanuele Berti2026-09-04
⚛️ general relativity

Constraint closure and gravitational-wave content of shear-free cosmologies in metric f(R) gravity

This paper derives the consistency conditions for linear shear-free perturbations in metric f(R)f(R) gravity, demonstrating that while such constraints eliminate tensor gravitational waves and restrict vector modes based on curvature and matter properties, scalar radiation persists only within specific model- and background-dependent subspaces defined by the closure of the shear-free constraint.

Mudhahir Al Ajmi, Amare Abebe2026-09-04
⚛️ general relativity

Tidal forces in the quantum Oppenheimer--Snyder black hole

This paper investigates tidal forces in a loop quantum gravity-corrected Oppenheimer-Snyder black hole, demonstrating that quantum effects replace the central singularity with a regular bounce that keeps tidal forces finite for massive particles while revealing that the quantum parameter's sign and magnitude dictate the presence and visibility of this structure to distant observers.

Anuar Idrissov, Hernando Quevedo2026-09-04