3151 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 study utilizes ray-tracing simulations with a fisheye camera model to analyze the visual characteristics and shadow properties of rotating black holes in 4D Einstein-Gauss-Bonnet gravity under thin accretion disk and celestial light sphere illumination, ultimately constraining the theory's coupling parameter using observational data from M87* and Sgr A*.
This paper demonstrates that a Weyl-flat null origin of inflation is compatible with current observations by establishing it as an asymptotic universality class for single-field models, which yields a viable phenomenological framework with realistic spectral indices and tensor-to-scalar ratios.
This paper proposes a quantum-deformed phase-space geometry framework that, through a section-pullback reduction to effective four-dimensional spacetime, yields modified gravitational and cosmological equations capable of describing inflationary dynamics and linking quantum gravity effects to observable inflationary corrections.
This paper demonstrates that the LIGO–Virgo–KAGRA verification of the Hawking area law imposes stringent constraints on local Stelle and nonlocal quantum gravity theories, effectively narrowing their ambiguities by requiring specific conditions on their action and propagators while simultaneously establishing the classical entropy-area law and realizing Barrow's fractal black holes.
This paper introduces a general reduction scheme that transforms arbitrary -term recurrence relations into a three-term form, thereby extending Leaver's continued-fraction method to calculate quasinormal modes in modified gravity theories like dynamical Chern-Simons gravity where standard methods fail due to higher-order couplings.
This study utilizes a self-consistent cosmological framework to demonstrate that the gravitational wave event GW231123 is best explained by a hierarchical merger channel in dense globular clusters rather than isolated binary evolution or Population III stars, as the latter fail to reproduce the event's inferred merger redshift and mass constraints.
This paper presents a systematic Bayesian MCMC analysis of sixteen ghost-free, string-inspired inflation models using Planck 2018 and ACT data, demonstrating that while all models successfully reproduce the observed scalar spectral tilt, the preference for specific datasets is driven by the Hubble parametrization rather than the coupling function, with the parameter emerging as a stable fundamental constant.
This paper demonstrates that estimating the galactic foreground for spaceborne gravitational wave detectors by analyzing the spatial distribution and population properties of resolved binary systems enables the successful detection of an injected stochastic background in the Taiji Data Challenge II.
This paper presents and validates a practical, phase-coherent mapping framework for pulsar timing arrays that preserves the full complex polarization state of gravitational waves, enabling a unified analysis of stochastic backgrounds, anisotropy, and individual sources directly from minimally processed sky maps.