2593 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 utilizes the heat kernel technique to demonstrate that specific ghost-free, infinite derivative gravity theories with generic form factors can completely cancel one-loop ultraviolet logarithmic divergences in four dimensions, thereby identifying conditions for renormalizability and providing general expressions for beta functions.
Using symplectic model order reduction, this paper demonstrates that the minimal number of canonical degrees of freedom required to describe the Hamiltonian evolution of a regularised scalar field scales with the area of the region rather than its volume, a phenomenon driven by the count of distinct normal-mode frequencies and observed in both flat and curved spacetimes as well as weakly interacting theories.
This paper presents a fully covariant and gauge-invariant formulation of electromagnetic wave propagation in static black hole spacetimes that reduces both axial and polar sectors to a unified master equation, enabling the derivation of a closed-form, position- and frequency-dependent effective refractive index in Schwarzschild geometry to provide an intuitive optical framework for analyzing gravitational effects on wave dynamics.
This paper presents a radiative post-processing framework for relativistic hydrodynamics simulations of black hole-disk collisions, revealing that the resulting luminous flares are primarily driven by super-Eddington accretion onto the secondary black hole rather than ejecta cooling, with their brightness and spectral evolution strongly dependent on collision velocity and disk density.
This paper interprets multiway gravitational junctions in AdS as interfaces between holographic conformal theories, demonstrating that their linearized scattering is governed by universal quantum maps factorizing into a tension-dependent scattering matrix and Virasoro automorphisms driven by stringy modes.
This paper derives exact analytic formulas that express the mass, distance, rotation parameter, and the modified gravity coupling parameter of Schwarzschild-MOG and Kerr-MOG black holes directly in terms of observable accretion disk quantities, thereby providing a method to empirically test deviations from standard general relativity.
This paper investigates the vacuum-induced current density of a charged scalar field in a -dimensional cosmic dispiration spacetime threaded by a magnetic flux, demonstrating that the helical geometry of the defect generates both azimuthal and axial current components that are periodic in the magnetic flux and significantly influenced by the screw dislocation parameter.
This study quantifies how non-Gaussian transient noise glitches in LIGO detectors bias the parameter estimation of compact binary coalescence signals, revealing significant distortions in mass, spin, and sky position—particularly when glitches occur shortly before the merger—and establishing time-separation thresholds to identify when glitch subtraction is necessary for unbiased results.
This paper introduces a computationally efficient frequentist method for detecting continuous gravitational waves in Pulsar Timing Array data that combines adaptive spline fitting for non-parametric red noise suppression with optimal pulsar selection, achieving accuracy comparable to Bayesian analysis while reducing computation time from days to hours to enable scalable searches for next-generation large-scale arrays.
This paper demonstrates that in uniformly accelerated quantum systems, the operational distinguishability of temporal ordering emerges from the interplay between the Kubo--Martin--Schwinger (KMS) condition and non-commuting observables, quantified by quantum relative entropy as a closed-form function of the dimensionless ratio between temperature and detector energy.