4428 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.
This paper refutes claims that a measurable "direct wave" originating from inside the remnant black hole's light ring exists in binary black hole merger ringdowns, demonstrating instead that the early-time signal deviation from quasinormal modes is governed by the light ring rather than the event horizon.
This paper presents an exact, closed-form solution for the total photon count and radiation characteristics of a particle following a Newtonian Kepler parabola under a fully relativistic treatment, revealing that the photon count is finite and scale-independent at the parabolic threshold while diverging for hyperbolic trajectories arbitrarily close to it.
This paper demonstrates that while the shadow diameter of rotating logarithmic- and exponential-entropy wormholes is degenerate with that of Kerr black holes, a multi-parameter observational fingerprint combining rotational asymmetry, strong-deflection lensing coefficients, Lyapunov exponents, and orbital frequencies can effectively distinguish these horizonless objects from black holes.
This paper investigates a new "super accelerating" regime of the charged C-metric characterized by restricted polar coordinates and a new axis of symmetry, which alters the spacetime's conical singularity structure, yields a simplified Komar mass formula when the south pole defect is removed, and reveals new limiting geometries in the near-extremal limit.
This paper investigates the degenerate-horizon limits of vacuum accelerating Kerr--NUT spacetimes, demonstrating that cubic criticality induces a local homothety to the swirling universe and explicitly mapping ordinary extremal, Nariai, and cubic near-horizon metrics to specific curvature sectors within the non-expanding Plebanski--Demianski family.
This paper proposes an alternative approach to test the Weak Cosmic Censorship Conjecture across the entire parameter space of Einstein-Born-Infeld black holes, circumventing the computational difficulties associated with calculating the self-energy of test particles in nonlinear electrodynamics.
This paper numerically investigates how a localized Astrophysical Dark Matter halo with a stiff matter equation of state modifies the spacetime geometry of a static black hole, finding that the halo shifts the innermost stable circular orbit inward compared to the Schwarzschild case, with the magnitude of the shift increasing for larger halo core radii.
This paper demonstrates that the dimensional reduction of four-dimensional Yang-Mills instantons on Taub-NUT and Eguchi-Hanson backgrounds yields three-dimensional matter configurations exhibiting a "Gravitational Cheshire effect," where specific sectors of the field either fully or partially screen their own gravitational backreaction, resulting in stealth or partially stealth composite states on flat space.
This paper calculates the static electric quadrupolar tidal Love numbers for black holes in four-dimensional quadratic gravity, finding that while the Schwarzschild solution yields a zero response, a numerical non-Schwarzschild solution exhibits a nonzero negative response that is derived using Kodama–Ishibashi gauge-invariant variables and matched perturbations across a coupled radial system.
This paper systematically constrains three distinct connection branches of scalar-nonmetricity cosmology using modern observational data, finding that while all can reproduce cosmic acceleration, Connection I is statistically favored over the standard CDM model according to the Akaike information criterion.