3207 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 provides a concise review of a cosmological model based on transactional entropic gravity, originally presented at the 2025 Lake Como School and detailed in a 2023 publication by Schlatter and Kastner, which addresses dark matter, dark energy, and cosmological tensions.
This paper demonstrates that gravitational lensing cannot explain the high-mass black holes observed by LIGO and Virgo, as the proposed lensing model fails to simultaneously satisfy constraints from merger counts, mass and distance distributions, the absence of strongly lensed events, and the stochastic gravitational-wave background.
This paper introduces SEOBNRv5PHM_NNSur7dq10, a fast neural network surrogate model for the SEOBNRv5PHM waveform that accurately covers generically precessing quasicircular binary black holes with mass ratios up to 1:10, offering significant computational speedups for gravitational wave detection and parameter inference.
This paper constructs exact spherically-symmetric black hole solutions in dimensions for Einstein gravity coupled to two Maxwell fields and a dilaton by mapping the equations of motion to one-dimensional Toda equations of all rank-2 Lie groups, deriving new solutions for and cases, and verifying that their thermodynamic properties can be determined without explicitly solving for the metric.
Using B-spline reconstruction on the GWTC-4.0 catalog, this study reveals a logarithmic hierarchy of emergent structures in the binary black hole mass distribution that significantly impacts Hubble constant measurements, proposing a low-mass subpopulation approach to mitigate modeling systematics for robust population-based cosmology.
This paper analyzes 3D GRMHD simulations to reveal that during flux eruption events in magnetically arrested disks, the equatorial accretion flow near the black hole becomes dominated by low azimuthal modes () due to the reconnection of horizontal magnetic fields into buoyant, vertical flux bundles that detach and expel excess magnetic flux.
This paper presents a hydrodynamic analog of the Klein Paradox using a linear elastic medium to demonstrate that vacuum instability and pair production arise from mechanical breakdown under supercritical stress, thereby offering a concrete pedagogical model for visualizing these quantum field theory phenomena.
This paper demonstrates that Many-Body Gravity (MBG), a modified 5-D gravity theory, naturally reproduces cosmic inflation and resolves time-definition issues in non-interacting universes by utilizing entropic terms and interacting massless scalar fields, all without requiring dark matter.
This paper employs a perturbative analysis of polynomial-type spatially covariant gravity Lagrangians up to cubic order around a cosmological background to derive specific coefficient conditions that eliminate the scalar mode, thereby identifying five explicit models that propagate only the two tensorial degrees of freedom characteristic of general relativity.
This paper proposes that negative densities of states in the 3D gravitational path integral can be cured by incorporating spinning states interpreted as bulk defects and overspinning BTZ geometries, which arise from mixed elliptic-hyperbolic identifications and exhibit causal pathologies despite being smooth pure gravity quotients of AdS.