3106 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 develops a new mathematical framework for combining pulsar timing array and astrometric data to forecast how joint analyses can significantly improve constraints on the mass of the graviton.
This paper presents an invariant characterization of the Kerr spacetime that utilizes a specific function to identify and efficiently compute the properties of spherical photon orbits and other geometrically significant surfaces, such as ergosurfaces and horizons.
This paper demonstrates that Scalar-Tensor-Vector Gravity (STVG-MOG) can consistently explain both individual cluster dynamics and the large-scale force law inferred from pairwise kinematic Sunyaev-Zeldovich data by showing that the theory's Yukawa-modified acceleration reduces to an effective inverse-square law at cosmological separations.
This paper proposes an AI-enhanced Differentiable Weighted Least Squares (AI-WLS) framework that combines a dilated residual network with a physical solver to achieve high-precision characterization of test-mass magnetic properties by effectively suppressing non-stationary noise in torsion-pendulum measurements for the Taiji gravitational wave mission.
This paper investigates the spherically symmetric gravitational collapse of an inhomogeneous, anisotropic fluid in Rastall gravity, demonstrating that by tuning the Rastall parameter to nullify effective radial pressure, one can obtain exact non-singular solutions where the matter undergoes a bounce without the formation of trapped surfaces or a spacetime singularity.
The paper introduces , an open-source physics-informed neural network architecture that learns the continuous mapping between physical parameters and their corresponding spectra, demonstrating high-precision performance by accurately predicting the quasinormal modes of Kerr black holes across a wide range of spins.
This paper utilizes the ADM formulation to perform a small- expansion of general relativity up to next-to-next-to-leading order, providing a systematic framework for constructing exact stationary vacuum solutions in both strong- and weak-gravity regimes, including corrections to Kerr and C-metric geometries.
This paper investigates the shadow geometry and photon regions of a Kerr-Newman-like black hole in Bumblebee gravity surrounded by a non-homogeneous power-law plasma, ultimately demonstrating that its physical parameters are consistent with observational constraints from the M87* Event Horizon Telescope data.
The paper demonstrates that for nonlinear electrodynamics with equal electric and magnetic charges, there exist configurations where the electromagnetic invariant vanishes everywhere, leading to simplified exact solutions across general relativity and various extended theories of gravity.
This paper investigates the cosmic evolution within the gravity framework, demonstrating through MCMC analysis and BBN constraints that the model is a physically viable alternative to CDM that successfully describes the universe's transition from early-time nucleosynthesis to late-time accelerated expansion.