3285 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 generalizes a quantum description of black hole dust cores from spherical symmetry to rotating geometries by quantizing dust particle geodesic motion to determine the many-body ground state, revealing how angular momentum influences the core's size and effective interior geometry.
This paper investigates the quantum-corrected Hawking evaporation and absorption cross-sections of near-extremal rotating black holes by incorporating strong near-horizon quantum fluctuations, revealing that these corrections significantly slow down the late-time evaporation process and alter the energy decay rate compared to semiclassical predictions.
This paper presents the first fully analytic construction of a stable, finite-thickness gravastar within the Shtanov-Sahni braneworld scenario featuring a timelike extra dimension, demonstrating that bulk Weyl corrections and negative brane tension naturally regularize the interior geometry to avoid singularities without relying on idealized thin-shell approximations.
This paper demonstrates that the Stringy-Running-Vacuum-Model (StRVM) inflationary scenario is phenomenologically complete and fully embeddable in string theory, as the only additional unitary four-derivative terms allowed by local field redefinitions in (3+1) dimensions are subleading and have no practical impact on inflationary physics.
Using high-resolution GRMHD simulations, this study demonstrates that density and magnetic field inhomogeneities in accretion flows around Kerr black holes generate steeper power spectra, longer correlation times, and larger coherent structures compared to unperturbed cases, offering new insights into interpreting Event Horizon Telescope observations of supermassive black holes.
This thesis develops a framework for computing gravitational scattering amplitudes in curved backgrounds by quantizing general relativity on Schwarzschild-Tangherlini spacetime and applying worldline quantum field theory to derive Compton amplitudes that match established flat-space results.
This paper demonstrates that relativistic accretion disk spectra from the AGN MCG-06-30-15 exhibit a significant degeneracy between spinning Kerr black holes and non-spinning JMN-1 naked singularities, potentially leading to incorrect spin measurements and highlighting the need for independent spin constraints to distinguish between these collapsed objects.
This design report outlines the revised Advanced Virgo Plus (AdV+) upgrade strategy for the O5 observing run, which integrates stable recycling cavities, a modified central interferometer layout, and comprehensive subsystem renewals to overcome previous stability limitations and significantly enhance detector sensitivity and astrophysical reach.
This study investigates the equilibrium structure of white dwarfs within the quadratic gravity framework, demonstrating that positive nonmetricity corrections reduce the maximum stellar mass below the Chandrasekhar limit while yielding configurations consistent with the observed properties of the ultra-massive white dwarf ZTF J1901+1458.
This paper extends the analytical understanding of nonlinear power-law tails in black hole ringdowns from Schwarzschild to Kerr spacetimes by deriving and numerically confirming that the late-time waveform decay follows the same power law, driven by the Minkowski nature of the far-field region.