3334 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 derives compact and accurate analytic expressions for the gravitational quasinormal modes of a regular black hole embedded in a Dehnen-type dark-matter halo, revealing that the axial perturbations split into non-isospectral "up" and "down" channels beyond the eikonal regime.
This study investigates the observational signatures of rotating Ayón-Beato-García black holes, revealing how their mass, spin, and electric charge influence shadow morphology and accretion disk images, and ultimately constrains the electric charge parameter to a specific range consistent with Event Horizon Telescope observations of M87* and Sgr A*.
This paper investigates the accelerated expansion of the universe within teleparallel gravity by proposing two cosmological models based on a parametrized Hubble parameter, which are then constrained and analyzed using Bayesian statistics on cosmic chronometer and Pantheon datasets to evaluate their expansion history, cosmological parameters, energy conditions, and the current age of the universe.
This paper presents the first of a three-part series detailing the overview, event selection, and general consistency tests of General Relativity using 91 confident gravitational-wave signals from the GWTC-4.0 catalog, finding no evidence for deviations from the theory in the dynamical and strong-field regime.
This paper presents parameterized tests of General Relativity using 91 confident gravitational-wave events from GWTC-4.0, finding no evidence for deviations from GR, spin-induced quadrupole anomalies, or line-of-sight acceleration, while significantly improving constraints on modified gravity theories and the graviton mass.
This paper presents seven tests of the remnants from 42 confident gravitational-wave events in GWTC-4.0, finding overall consistency with General Relativity and no evidence for post-merger echoes, while noting that apparent deviations in hierarchical analyses are likely attributable to statistical variance from the finite catalog size.
This paper investigates the thermodynamic properties of charged AdS black holes surrounded by a cloud of strings in Einstein-Bumblebee gravity, demonstrating that Lorentz violation and string cloud parameters significantly alter critical behaviors and phase transitions, while extending the analysis to a Tsallis entropy framework reveals further modifications to stability and Hawking radiation sparsity.
This study investigates the evolution of the Universe within a Bianchi type-I cosmological model incorporating Lyra's geometry and a scalar field, demonstrating that Lyra's parameter significantly influences the early universe while its effects diminish in the present era.
This paper demonstrates that within Poincaré gauge theory, the inclusion of torsion in spacetime geometry enables rotating black holes to transfer energy to Dirac fermions via chiral asymmetry while preserving the Pauli exclusion principle, a mechanism distinct from classical General Relativity.
This paper computes the quasinormal mode frequencies of neutral scalar perturbations in extremal Reissner-Nordström black holes by mapping their master equation to the quantum Seiberg-Witten curve of gauge theory with two flavors, utilizing the Nekrasov-Shatashvili limit to derive non-perturbative analytical results that match numerical benchmarks and capture quasi-resonance behavior.