⚛️ Category

gr-qc

3875 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

GWTC-5.0: Observations from the Second Part of the Fourth LIGO-Virgo-KAGRA Observing Run and Updates to the Gravitational-Wave Transient Catalog

This paper presents GWTC-5.0, an updated catalog that incorporates 150 new compact binary coalescence candidates detected during the second part of the fourth LIGO-Virgo-KAGRA observing run, bringing the total number of confirmed gravitational-wave transients to 390 and highlighting the discovery of an exceptionally strong binary black hole signal (GW250114_082203) with a network signal-to-noise ratio exceeding 70.

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration2026-05-27
⚛️ general relativity

GWTC-5.0: Population Properties of Merging Compact Binaries

Using data from the 267 merging compact binaries in the GWTC-5.0 catalog, this study characterizes the population properties of binary black holes, revealing a merger rate of 27.5–49.4 Gpc⁻³ yr⁻¹, evidence for a subpopulation of rapidly spinning black holes indicative of hierarchical mergers, and distinct features in the mass and spin distributions including a peak near 10 M☉ and a slope change around 35 M☉.

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration2026-05-27
⚛️ general relativity

GWTC-5.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation

Using 236 gravitational-wave sources from the GWTC-5.0 catalog, this study refines the Hubble constant estimate to 71.0−7.1+9.071.0^{+9.0}_{-7.1} km s−1^{-1} Mpc−1^{-1} with a 25.7% reduction in uncertainty compared to previous results and confirms no deviations from general relativity in gravitational-wave propagation.

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration2026-05-27
⚛️ general relativity

w0w_0-probe: A new diagnostic of dark energy based on OmOm

This paper introduces the w0w_0-probe, a novel, model-independent diagnostic derived from the Om(z)Om(z) function that enables the direct and robust estimation of the current dark energy equation of state (w0w_0) without amplifying noise through differentiation, revealing that current observational data favors an evolving dark energy model with w0≃−0.62w_0 \simeq -0.62 and excludes the standard Λ\LambdaCDM model at the 95% confidence level.

Satadru Bag, Ryan E. Keeley, Varun Sahni, Arman Shafieloo2026-05-27
⚛️ general relativity

Strong-lensing degeneracies of black holes embedded in self-interacting scalar field dark matter halos

This paper numerically investigates strong gravitational lensing by black holes embedded in self-interacting scalar field dark matter halos, finding that while most observables show only minute deviations from the Schwarzschild case, time delays between relativistic images offer the most promising signature for detecting such dark matter environments around supermassive black holes.

Mohsen Fathi, Gabriel Gómez2026-05-27
⚛️ phenomenology

Effective Phantom Dark Energy: What Cosmological Reconstruction Does and Does Not Imply

This paper clarifies that observational evidence for effective phantom dark energy, derived from background-level reconstructions within standard cosmological assumptions, does not necessarily imply the existence of fundamental phantom fields, microscopic instabilities, or a catastrophic cosmic future, but rather can arise from various physical mechanisms without violating fundamental energy conditions.

Swagat S. Mishra2026-05-27✓ Author reviewed ⓘ
⚛️ general relativity

Systematic Effects of Chaotic Magnetic Fields on Neutron Star Tidal Deformability: Implications for Gravitational Wave Constraints on Dense Matter

This study employs a chaotic magnetic field approximation to demonstrate that strong magnetic fields (101510^{15}--101610^{16} G) systematically increase neutron star radii and tidal deformabilities by up to 18%, necessitating corrections to current gravitational wave constraints on the dense matter equation of state.

Debarshi Mukherjee2026-05-26