2593 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 proposes a novel concept of astrophysical mirroring within the Schwarzschild framework, demonstrating through theoretical and numerical analysis that the extreme spacetime curvature around compact massive objects can bend light rays to create mirror-like reflection images of distant sources.
This paper computes the stochastic gravitational wave background generated by parametric resonance of a spectator scalar field during reheating, deriving a master formula that predicts a detectable high-frequency signal () while validating the analytical framework against nonlinear lattice simulations to capture both superhorizon evolution and fragmentation effects.
This paper establishes a historical optical foundation for stationary vacuum Kerr--Schild spacetimes by demonstrating how a single complex optical seed, derived from expansion and twist, algebraically reconstructs the spacetime congruence and serves as the normalized zeroth-copy data that generates both the metric profile and the associated single-copy gauge field within the double-copy framework.
This paper introduces a causal convolutional neural network trained on RNS-generated data to rapidly and accurately reconstruct observables for fast-rotating neutron stars, reducing computation time from approximately 30 minutes to 50 milliseconds per configuration and enabling efficient inference analyses that were previously hindered by the high cost of traditional two-dimensional modeling.
This study analyzes gravitational-wave events from the LIGO-Virgo-KAGRA O4a and O4b runs to identify dynamically formed binary black holes, finding that their typical recoil velocities likely eject merger remnants from globular clusters but allow for potential retention in nuclear star clusters, thereby constraining hierarchical black hole growth scenarios.
This paper presents new analytic Ricci-flat planar black hole and soliton solutions with primary scalar hair in asymptotically AdS space, demonstrating that these regular geometries undergo a first-order phase transition where the hairy soliton acts as the ground state, with the transition temperature and preferred phase window significantly influenced by the scalar hair parameter.
This paper presents Causal Dynamical Triangulations (CDT) as a nonperturbative lattice approach to quantum gravity that successfully demonstrates the dynamical emergence of a classical de Sitter-like universe from a sum over causal triangulations, while revealing unique short-scale properties such as a spectral dimension of approximately 2 and evidence for an ultraviolet fixed point.
This paper investigates the strong gravitational lensing, timelike geodesic dynamics including ISCO stability, and electromagnetic quasinormal modes of a static spherically symmetric black hole with a global monopole, revealing that increasing the monopole parameter enlarges the shadow radius and ISCO while inducing slower damping in gravitational wave oscillations.
This paper presents the hardware overview and commissioning status of the CHRONOS detector, a cryogenic sub-Hz torsion bar interferometer incorporating quantum non-demolition speed meter techniques, which is designed to detect intermediate-mass black hole mergers and stochastic gravitational wave backgrounds by overcoming low-frequency noise limitations.
This paper presents the noise budget analysis and performance evaluation of CHRONOS, a proposed cryogenic sub-Hz gravitational-wave detector utilizing a cross torsion-bar configuration and quantum speed meter readout, demonstrating its potential to achieve competitive low-frequency sensitivity while also enabling faster earthquake early warnings through prompt gravity-gradient detection.