gr-qc papers | Gist.Science

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.

Quasinormal modes and grey-body factors of axial gravitational perturbations of regular black holes in asymptotically safe gravity

This paper investigates the axial gravitational perturbations of regular black holes in asymptotically safe gravity by employing the Bernstein spectral method and asymptotic iteration method to compute quasinormal modes, revealing that while the fundamental mode remains largely unaffected by the deviation parameter, higher overtones exhibit significant deviations from the Schwarzschild case, alongside a strong agreement between grey-body factors and quasinormal modes for larger multipole numbers.

Qi-Long Shi, Rui Wang, Wei Xiong, Peng-Cheng Li2026-04-07⚛️ gr-qc

The index of the cosmological horizon and the area-charge-inequality

This paper investigates the index of marginally outer trapped surfaces (MOTS) representing cosmological horizons in Kerr-Newman-de Sitter spacetime, establishing that the index is at least one (and exactly one under specific mass bounds) and deriving an area-charge inequality for MOTS with index one under the dominant energy condition.

Neilha Pinheiro2026-04-07⚛️ gr-qc

Localized five-dimensional rotating brane-world black hole Analytically Connected to an to an AdS $_5$ boundary

This paper presents a method to analytically construct a localized, five-dimensional rotating braneworld black hole that connects to an AdS $_5$ boundary and reproduces the standard four-dimensional Kerr spacetime on the brane, supported by a non-diagonal anisotropic fluid in the bulk without requiring matter on the brane itself.

Milko Estrada, Francisco Tello-Ortiz2026-04-07⚛️ gr-qc

Constraining Inflationary Particle Production with CMB Polarization

This paper constrains inflationary particle production by applying a novel Poissonian likelihood analysis to Planck CMB polarization data to search for massive scalar-induced hotspots, finding no evidence for such features and establishing significantly tighter bounds on inflaton couplings than previous work, while forecasting improved constraints from future ACT and cosmic-variance-limited experiments.

Luca H. Abu El-Haj, Oliver H. E. Philcox, J. Colin Hill2026-04-07⚛️ hep-ph

Testing black hole metrics with binary black hole inspirals

This study utilizes gravitational wave data and the effective one-body formalism within a parameterized post-Einsteinian framework to confirm that binary black hole inspirals are consistent with the classical Kerr solution of General Relativity, thereby placing stringent constraints on deviations from the no-hair theorem while demonstrating that orbital eccentricity has a subdominant effect on these tests.

Zhe Zhao, Swarnim Shashank, Debtroy Das, Cosimo Bambi2026-04-07⚛️ gr-qc

Quasinormal modes of Kerr-Newman black holes: revisiting the Dudley-Finley approximation

This paper reassesses the accuracy of the Dudley-Finley approximation for Kerr-Newman quasinormal modes by comparing it to full coupled calculations, revealing typical agreement within 10% for real frequencies and 1% for imaginary parts, while also deriving analytic boundaries for distinct near-extremal damping regimes and analyzing the trajectories of high-overtone modes.

Sagnik Saha, Hector O. Silva2026-04-07⚛️ gr-qc

Bulk-to-bulk photon propagator in AdS

This paper computes the bulk-to-bulk photon propagator in Anti-de Sitter space across various gauges using momentum and position space techniques, ensuring gauge invariance through BRST symmetry and identifying the Fried-Yennie gauge as providing the simplest position space expression with improved infrared behavior.

Radu N. Moga, Kostas Skenderis2026-04-07⚛️ hep-th

Weak interactions and the gravitational collapse

This paper proposes the existence of a new class of ultra-compact astrophysical objects with masses around $10^{-3}$ solar masses, which are stabilized against gravitational collapse by the pressure generated from weak interactions via $Z$ -boson exchange at ultrahigh densities, effectively realizing Zeldovich's proposed equation of state.

Domenec Espriu2026-04-07⚛️ hep-ph

The quasinormal modes of the rotating quantum corrected black holes

This paper studies the quasinormal modes of rotating quantum-corrected black holes using a hyperboloidal framework and pseudo-spectral method, then demonstrates that employing informative priors in a methodological parameter estimation pipeline significantly tightens constraints on the quantum correction parameter and reveals deviations from the standard Kerr model.

Jia-Ning Chen, Zong-Kuan Guo, Liang-Bi Wu2026-04-07⚛️ gr-qc

Cosmological spacetimes with spatially constant sign-changing curvature

This paper demonstrates that globally hyperbolic cosmological spacetimes with spatially constant curvature that changes sign and topology over time can be constructed, challenging common interpretations of the Cosmological Principle, and introduces new models developed in collaboration with several researchers.

Miguel Sánchez2026-04-07⚛️ gr-qc

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