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 investigates charged rotating black holes in Kalb-Ramond gravity to derive constraints on the Lorentz-violating parameter and electric charge by comparing theoretical black hole shadow predictions with Event Horizon Telescope observations of M87* and Sagittarius A*.
This paper demonstrates that scalar perturbations on Kaigorodov pp-wave spacetimes exhibit zero-temperature dissipation through a discrete, gapped quasinormal mode spectrum, establishing that horizonless geometries can act as geometric absorbers without requiring an event horizon or entropy.
This paper demonstrates that in exotic compact object spacetimes like dyonic black holes, multiple coexisting branches of bound orbits can share identical topological indices yet produce radiatively distinct gravitational wave signatures, offering a novel observational probe for physics beyond general relativity.
This study demonstrates that even at its current modest sensitivity, KAGRA significantly enhances the sky localization of compact binary coalescences within the global detector network by providing geometric complementarity and breaking degeneracies, with performance improving substantially as its sensitivity increases to support effective electromagnetic follow-up.
This paper introduces a covariant orthogonality diagnostic to validate approximate analytical models of electromagnetic radiation reaction in Schwarzschild spacetime, demonstrating that combining the conservative Smith-Will and dissipative Gal'tsov tail terms significantly suppresses violations of four-velocity normalization compared to using the conservative term alone.
This study investigates strictly closed timelike orbits in a Schwarzschild spacetime embedded within a Dehnen-type dark matter halo, demonstrating how dark matter parameters amplify orbital scales and induce phase lags in gravitational waves while creating distinct signatures in electromagnetic light curves to enable multi-messenger detection of dark matter properties.
This paper introduces Basilic, a modular, user-friendly pipeline built on the bilby framework for Bayesian inference and model selection of gravitational-wave bursts, demonstrating its capabilities through a study of degeneracies between binary black hole mergers and cosmic string signals.
This paper demonstrates that bipartite entanglement harvesting from a quantum vacuum using multiple Unruh-DeWitt detectors can be efficiently analyzed via a linearly scaling submatrix, revealing that increasing the number of detectors not only maximizes harvested entanglement in specific configurations but also broadens the operational ranges for energy gaps and separations.
This study presents a comprehensive analysis correlating the highest-energy neutrino event KM3-230213A with gamma-ray bursts by explicitly accounting for angular uncertainties and computing Lorentz invariance violation scales to identify a broader set of potential associations.
This paper revisits the thermodynamics of Hayward black holes in asymptotic flat spacetime to derive a novel entropy formula with logarithmic corrections, analyze their phase structure, and establish bounds on the final mass following the head-on merger of two equal-mass black holes while ensuring the validity of the second law of thermodynamics.