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.

Inferring the role of binary neutron star mergers in r-process nucleosynthesis with multi-messenger observations using Cosmic Explorer and Einstein Telescope

This paper proposes a method using third-generation gravitational-wave detectors (Cosmic Explorer and Einstein Telescope) to measure the fractional contribution of binary neutron star mergers to cosmic r-process nucleosynthesis by analyzing the redshift-dependent correlation between merger event rates and r-process abundances, achieving a precision of approximately 5–6% for both multi-messenger "bright-sirens" and "dark-sirens" scenarios.

Aman Agarwal, Suvodip Mukherjee, Daniel M. Siegel2026-05-25⚛️ gr-qc

On the Gravitational Angular Momentum of Axial Perturbations of a Regular Black Hole

This paper derives a closed expression for the gravitational angular momentum of axial perturbations in a Bardeen regular black hole using the teleparallel equivalent of general relativity, revealing a multipolar selection rule where the angular momentum vanishes for odd multipole indices but is nonzero for even ones.

S. C. Ulhoa, F. L. Carneiro, B. C. C. Carneiro2026-05-25⚛️ gr-qc

Entropy and stability of an extremally charged Einstein-Born-Infeld thin shell

This paper investigates the dynamical and thermodynamical stability of a spherical thin shell in Einstein-Born-Infeld gravity under extremally charged conditions, deriving stability criteria and demonstrating that the shell's entropy depends solely on its gravitational radius despite the presence of non-zero pressure.

Ernesto Eiroa, Griselda Figueroa-Aguirre, Miguel Peñafiel2026-05-25⚛️ gr-qc

Dissipative non-Abelian fluids from Scherk-Schwarz dimensional reduction

This paper constructs a $d$ -dimensional dissipative non-Abelian colored fluid by performing a Scherk-Schwarz dimensional reduction of a neutral viscous conformal fluid on an $n$ -dimensional unimodular group manifold, deriving the resulting hydrodynamic equations, transport coefficients, and entropy current to provide a toy model for non-Abelian dissipative hydrodynamics such as quark-gluon plasma.

Emilio Torrente-Lujan2026-05-25⚛️ hep-th

Indefinite probabilities in quantum spacetime: A deepening of unpredictability

This paper demonstrates that employing the $SU_q(2)$ quantum group to model rotational symmetry in spin- $\frac{1}{2}$ systems leads to non-commuting probability operators and an associated uncertainty principle, thereby establishing a framework of "indefinite probabilities" that fundamentally prevents observers from sharply measuring their relative orientation.

Vittorio D'Esposito, Giuseppe Fabiano, Domenico Frattulillo2026-05-25⚛️ gr-qc

Not all black holes decohere quantum superpositions

The paper demonstrates that near-extremal charged black holes can suppress or even eliminate the decoherence of charged particle superpositions at late times due to a spin-induced energy gap in the quantum black hole spectrum, thereby enhancing quantum coherence beyond semiclassical expectations.

Anna Biggs, Stefano Trezzi2026-05-25⚛️ hep-th

Precision Inflationary Predictions: Impact of Accurate End-of-Inflation Dynamics

This paper demonstrates that accurately determining the end of inflation and incorporating higher-order slow-roll corrections within a quantitative reheating framework induces significant shifts in the predicted scalar spectral index ( $n_s$ ) for the Starobinsky model, highlighting the necessity of precise end-of-inflation dynamics for future precision cosmology and model discrimination.

Debottam Nandi, Simran Yadav, Manjeet Kaur2026-05-22⚛️ gr-qc

Discriminating scalar ultralight dark matter from quasi-monochromatic gravitational waves in LISA

Using Bayesian analysis on one year of realistic LISA spacecraft orbits, this study demonstrates that space-based gravitational wave detectors can successfully distinguish signals from scalar ultralight dark matter, which induce oscillatory test mass motion, from those caused by quasi-monochromatic gravitational waves.

Jordan Gué, Peter Wolf, Aurélien Hees2026-05-22⚛️ gr-qc

Dark matter production from evaporation of regular primordial black holes

This paper proposes that regular primordial black holes can evaporate completely without forming exotic remnants by redefining their regularization parameters, thereby providing a unified framework to resolve both the black hole singularity problem and the dark matter abundance through modified Hawking evaporation dynamics.

Ngo Phuc Duc Loc2026-05-22⚛️ gr-qc

GW231123: Overlapping Gravitational Wave Signals?

This paper proposes that the gravitational wave event GW231123, previously interpreted as a single massive black hole merger, is more likely the result of two overlapping signals—potentially caused by gravitational lensing—which resolves significant discrepancies in source property measurements across different waveform models.

Qian Hu, Harsh Narola, Jef Heynen, Mick Wright, John Veitch, Justin Janquart, Chris Van Den Broeck2026-05-22⚛️ gr-qc

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