3949 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 argues that the Kerr-Schild and twistorial double copy prescriptions are equivalent for a broad class of self-dual vacuum solutions, a claim demonstrated through elementary null Lorentz transformations and illustrated with the self-dual Kerr-Taub-NUT spacetime.
This paper constructs the metric-affine analogue of quadratic degenerate higher-order scalar-tensor (DHOST) theories, demonstrating that imposing standard degeneracy conditions and the gravitational wave speed constraint restricts the theory to a specific Palatini Class Ia branch characterized by a single free function.
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 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 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.
This paper presents a canonical analysis of the Holst model for General Relativity with the Barbero parameter set to and unconstrained lapse and shift functions, deriving a complete system of 37 equations that confirms consistency with standard Einstein dynamics while revealing new differential constraints dependent on gauge choices, thereby establishing a viable foundation for extending Loop Quantum Gravity to dimensions beyond .
This paper demonstrates that cosmological models derived from generalized horizon entropies are viable within Big Bang Nucleosynthesis constraints, as their required parameters for late-time cosmic acceleration fall well within the bounds set by freeze-out conditions and light element abundances, despite the persistent lithium discrepancy.