⚛️ Category

gr-qc

3919 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

Testing an anisotropic spinor field--based Modified Chaplygin Gas model in Kantowski--Sachs spacetime with observational constraints

This paper proposes and observationally validates a viable cosmological model in Kantowski–Sachs spacetime where a massless nonlinear spinor field coupled to a Modified Chaplygin Gas unifies dark matter and dark energy, successfully reproducing late-time cosmic acceleration and fitting current data better than the standard Λ\LambdaCDM model while predicting an effectively isotropic universe today.

Mahendra Goray, Bijan Saha2026-05-07
⚛️ general relativity

A Master Equation for Screening in Luminal Horndeski Gravity

This paper presents a systematic framework for identifying active screening mechanisms in luminal Horndeski gravity by deriving a master equation that recovers known Vainshtein and Chameleon effects while introducing a novel "Phaedrus" regime, supported by newly developed software tools for computing perturbations and solving nonlinear scalar equations.

Sergi Sirera, Tessa Baker, James Hallam, Krishna Naidoo2026-05-07
🔭 astrophysics

On the spin dependence of the emergent gravity phenomena as observed in axially symmetric black hole accretion with spatially varying adiabatic index

This article investigates stationary, low-angular-momentum, axially symmetric accretion onto a black hole with a spatially varying adiabatic index and shows that the resulting multi-transonic flow supports stable stationary shock waves as well as an emergent acoustic geometry featuring both black-hole and white-hole horizons, whose surface gravities are determined by local variations in the speed of sound.

Kalyanbrata Pal, Souvik Ghose, Ripon Sk, Arpan Krishna Mitra, Tapas K. Das2026-05-07
⚛️ general relativity

Emergent gravity from nonlinear perturbation of spherical accretion with variable adiabatic index

This paper demonstrates that gravity-like phenomena are not merely artifacts of linear perturbation but emerge from nonlinear higher-order perturbations in spherically accreting astrophysical systems with variable adiabatic indices, resulting in a dynamic effective acoustic spacetime where the acoustic horizon shifts in response to fluctuations in density, temperature, and mass accretion rate.

Rohith Ghosh, Souvik Ghose, Biplab Raychaudhuri, Apashanka Das, Tapas K. Das2026-05-07
⚛️ general relativity

Black-Hole Scattering in Einstein-scalar-Gauss-Bonnet: Numerical Relativity Meets Analytics

This paper demonstrates excellent agreement between fully nonlinear numerical simulations and effective-one-body analytic models for binary black hole scattering in Einstein-scalar-Gauss-Bonnet gravity, validating the capture of strong-field scalar-gravitational dynamics and paving the way for semi-analytical waveform templates in modified gravity theories.

Shaun Swain, Tamanna Jain, Llibert Aresté Saló2026-05-07
⚛️ high-energy theory

Kerr/CFT Traversable Wormhole with Fermionic Double-Trace Deformation

This paper constructs a traversable wormhole in the near-extremal Kerr background by applying a fermionic double-trace deformation, demonstrating that the absence of fermionic superradiance allows for stable wormhole opening across all regions while producing observable echoes with time delays bounded by the black hole's scrambling time.

M. Zhahir Djogama, Fitria Khairunnisa, Hadyan Luthfan Prihadi, Freddy Permana Zen2026-05-07
⚛️ general relativity

Artificial Precision Timing Array: bridging the decihertz gravitational-wave sensitivity gap with clock satellites

This paper proposes the Artificial Precision Timing Array (APTA), a novel gravitational-wave detector concept utilizing a constellation of precision-timing satellites to bridge the decihertz sensitivity gap and observe intermediate-mass black hole mergers and early inspirals with currently attainable clock technology.

Lucas M. B. Alves, Andrew G. Sullivan, Xingyu Ji, Doğa Veske, Imre Bartos, Sebastian Will, Zsuzsa Márka, Szabolcs Márka2026-05-06