3801 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 proposes a novel framework that utilizes Gaussian process reconstruction to model line-of-sight galaxy redshift distributions in incomplete catalogs, thereby significantly improving the precision of Hubble constant constraints from dark siren cosmology compared to standard homogeneous completion methods.
This paper demonstrates that plateau-shaped inflaton potentials, often favored for their low tensor-to-scalar ratios, are particularly susceptible to anti-ultralocality effects which, starting from generic initial conditions, either prevent sufficient inflation or trigger quantum runaway, thereby imposing increasingly severe fine-tuning requirements as the inflation energy scale decreases.
This paper demonstrates that the first connection branch of gravity admits an exactly integrable CDM-mimicking cosmology by employing cosmographic closure and auxiliary-variable methods to derive closed-form analytical solutions for both background and linear perturbation dynamics, while confirming the structural stability of these solutions and comparing them with gravity.
This paper investigates the equilibrium Laplace surfaces and Lidov-Kozai cycle dynamics of eccentric orbits around a Kerr black hole with a companion star, revealing that stability is restricted to specific inclinations and that the interplay between relativistic and tidal precessions creates a non-monotonic frequency minimum that explains the nearly isotropic orientation of the Galactic center's S-cluster.
This paper presents a stable, fully 3D Summation-by-Parts scheme for linear wave equations on hyperboloidal foliations of Minkowski spacetime. It effectively addresses the coordinate singularities associated with curvilinear coordinates and infinity through compactification. Additionally, it generalizes the definition of Kreiss-Oliger dissipation to curvilinear coordinates on general spatial manifolds, demonstrating promising results for future applications to nonlinear systems, such as the Einstein Field Equations.
This paper investigates the response of a localized spin-1/2 detector falling into a Schwarzschild--MOG black hole by quantizing a scalar field in a Boulware basis and analyzing how finite-gate switching and global scattering effects modify the excitation probabilities and detailed-balance ratios near the horizon.
This paper introduces a novel component-separation algorithm using Wavelet Phase Harmonics statistics to successfully isolate Galactic dust emission from cosmic infrared background anisotropies in Planck 353 GHz data across various high-latitude sky regions, outperforming standard template-fitting methods while preserving the statistical correlation between dust and neutral hydrogen column densities.
This paper establishes a non-perturbative, branch-dependent framework for reconstructing exact metric gravity Lagrangians from generalized horizon entropies, demonstrating how specific entropy corrections translate into distinct curvature terms and providing a direct criterion for Dolgov-Kawasaki stability.
The paper proposes and demonstrates through numerical and analytical calculations that a scalar field non-minimally coupled to curvature can dynamically compensate for a large negative vacuum energy in anti-de Sitter space, thereby preventing gravitational collapse and enabling the universe to evolve into a power-law expansion.
This paper establishes a GUM-consistent framework to quantify atmospheric Newtonian noise in torsion-balance measurements of the gravitational constant , deriving spatial transfer functions for benchmark geometries to demonstrate that while current atmospheric contributions are below reference uncertainty levels, they become significant as systematic errors approach the part-per-million regime.