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.

⚛️ general relativity

GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog

This paper introduces GWTC-4.0, the fourth version of the Gravitational-Wave Transient Catalog, which compiles short-duration gravitational wave signals detected by the LIGO-Virgo-KAGRA Collaboration up to January 31, 2024, and serves as the foundational document for a collection of articles detailing the analysis methods, event summaries, population measurements, and specific candidate discussions associated with this data release.

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration, A. G. Abac, I. Abouelfettouh, F. (…)2026-06-29

⚛️ general relativity

GWTC-4.0: Updating the Gravitational-Wave Transient Catalog with Observations from the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run

This paper presents GWTC-4.0, a major update to the Gravitational-Wave Transient Catalog that doubles its size to 218 candidates by incorporating 128 new compact binary coalescence events detected during the first part of the fourth LIGO-Virgo-KAGRA observing run, including the most massive binary black hole observed to date and the first signals with network signal-to-noise ratios exceeding 30.

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration, A. G. Abac, I. Abouelfettouh, F. (…)2026-06-29

⚛️ high-energy theory

Emergent structures in open EFTs

This paper investigates emergent structures in open effective field theories by applying the Schwinger-Keldysh formalism to superfluid, Maxwell, and Einstein gravity systems, demonstrating that consistent open terms in gauge and gravitational theories require specific deformations of the equations of motion identities.

Perseas Christodoulidis2026-06-29

⚛️ general relativity

Inspiral tests of general relativity and waveform geometry

This paper employs a geometric framework and singular value decomposition to demonstrate how parameterized tests for general relativity deviations function, revealing their sensitivity to unmodeled effects, the role of waveform manifold geometry in governing Bayes factors, and the fundamental distinguishability of various waveform systematics.

Brian C. Seymour, Jacob Golomb, Yanbei Chen2026-06-29

🔢 mathematics

Curvature bounds, regularity and inextendibility of spacetimes

This paper establishes a novel connection between synthetic curvature bounds and the causal character of maximizers to prove that low-regularity inextendibility of spacetimes implies unbounded curvature, a result unattainable by classical methods that significantly strengthens previous findings.

Tobias Beran, John Harvey, Clemens Sämann2026-06-29

🔭 astrophysics

Impact of neutrino-electron scattering and an improved treatment of pair processes on binary neutron star mergers

This paper presents improved Monte Carlo neutrino transport simulations for binary neutron star mergers that incorporate inelastic neutrino-electron scattering and refined pair processes, revealing a 50% increase in ejected mass and significant reductions in heavy-lepton neutrino energy and luminosity without increasing computational costs.

Francois Foucart, Samantha Rath, Rowan Davidson, Patrick Chi-Kit Cheong, Matthew D. Duez, Lawrence Kidder, Harald Pfeiff (…)2026-06-29

⚛️ general relativity

Tidal Forces in the Presence of Torsion and Nonmetricity

This paper derives a generalized geodesic deviation equation in metric-affine gravity to demonstrate how torsion and nonmetricity introduce distinct, measurable corrections to tidal accelerations, offering a potential pathway for future direct detection of post-Riemannian spacetime features.

Armin van de Venn, Marcelo Netz-Marzola, David Vasak, Jürgen Struckmeier2026-06-29

⚛️ general relativity

The crust of dark-matter admixed neutron stars: bulk properties and torsional oscillations

This paper demonstrates that dark matter admixture in neutron stars can significantly reduce crust thickness and increase torsional oscillation frequencies, particularly when a "dark core" forms, offering a potential observational method to distinguish dark matter effects from microphysical uncertainties like electron screening.

Jiayi Zhang, Hector O. Silva2026-06-29

⚛️ general relativity

Dynamics of Relativistic Binaries in Structured and Stochastic Environments: A Lagrange-Fourier-Hansen Framework

This paper introduces the Lagrange-Fourier-Hansen framework, a unified tool that models non-vacuum perturbations on relativistic binaries through resonant spectral projections and coupled orbital element equations to bridge the gap between phenomenological prescriptions and realistic environmental effects in gravitational-wave parameter estimation.

Lorenz Zwick, Conor Dyson, Brian C. Seymour, János Takátsy, Johan Samsing2026-06-29

⚛️ general relativity

Can a regular black hole be observationally distinguished from singular black holes as spinning lens partner in PSR-BH binaries?

Although the study proposes a novel time-of-arrival diagnostic based on frame dragging to distinguish regular Ayón-Beato and García black holes from singular Kerr and Kerr-Newman black holes in pulsar-binary systems, it concludes that under the thin-lens approximation, the observable differences are negligible (appearing only at third order or higher), rendering the two types of black holes indistinguishable despite their qualitative theoretical differences.

G. Y. Tuleganova, R. Kh. Karimov, R. N. Izmailov, K. K. Nandi2026-06-29

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