2693 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 investigates a specific class of vacuum solutions in dimensional static spacetimes with spherical and Euclidean symmetries, identifying two distinct non-trivial classes beyond Minkowski space that exhibit unique mass properties and singularity structures, including Kaluza-Klein bubbles with horizons and naked singularities with negative mass.
This paper presents a fully-relativistic numerical method for initializing and evolving vacuum tensor inhomogeneities during inflation, establishing a correspondence between Cosmological Perturbation Theory and numerical relativity to validate constraint preservation and enable the study of nonlinear gravitational effects on primordial tensor non-Gaussianity.
This paper presents the first full-sky, second-order perturbation theory computation of the angular bispectrum for matter number counts without the Limber approximation, incorporating both Newtonian and relativistic effects, and validates these theoretical predictions against relativistic light-cone simulations while providing publicly available code.
This paper demonstrates through numerical examples that identifying asymptotically flat regions in the maximally extended extreme Reissner–Nordström spacetime does not permit causality violations via timelike or nonradial null geodesics, unlike the non-extreme case, though a formal mathematical proof remains an open challenge.
This paper demonstrates that Vision Transformer (ViT) networks, trained on minimally preprocessed detector strain data, achieve sensitivity comparable to traditional matched-filter methods for continuous gravitational-wave searches while requiring significantly less manual design and hyperparameter tuning than previous convolutional neural network approaches.
This paper investigates a multidimensional gravity model with a spatially flat 4D de Sitter cosmology, demonstrating that a two-brane structure nucleates at high energies with an inter-brane distance that expands as energy decreases, leading to energy-scale-dependent variations in fundamental physical parameters like the Planck mass and Higgs vacuum expectation value, which differ between the two branes.
This paper extends the Ramsey interferometric protocol to static curved spacetimes, demonstrating that Unruh-DeWitt detectors provide a causally consistent framework for defining work distributions in quantum scalar fields that satisfy fundamental fluctuation theorems like the Crooks relation and Jarzynski equality.
This paper investigates the formation of primordial black holes as dark matter candidates within the Higgs hybrid metric-Palatini framework, demonstrating that enhanced primordial curvature perturbations can lead to a PBH abundance capable of accounting for all or part of the universe's dark matter depending on the coupling constant and e-folds number.
This paper investigates the circular geodesics, radiation properties, and observational appearance of a thin accretion disk around a loop quantum Reissner-Nordström black hole, deriving constraints on its quantum and charge parameters using M87* and Sgr A* data while demonstrating how the quantum parameter uniquely increases the innermost stable circular orbit radius compared to the charge parameter.
This paper investigates gauge gravitation theory in Riemann-Cartan space-time to resolve fundamental issues in general relativity, providing constraints and numerical solutions that describe a nonsingular, accelerating Universe across various cosmological models and discussing its astrophysical implications.