3949 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 reinterprets the circular Unruh effect by demonstrating that the tree-level decay of uniformly rotating particles arises from the emission of negative-energy quanta due to the absence of a global vacuum state, thereby proving that such particles cannot be stable without invoking a thermal bath.
This paper introduces first-order noncommutative corrections to Einstein-nonlinear electrodynamics using a Drinfel'd twist and Seiberg-Witten map, deriving perturbative solutions for static, spherically symmetric dyonic black holes that account for both intrinsic electromagnetic nonlinearity and noncommutative geometric effects.
Using Einstein@Home computing resources to analyze LIGO data from observing runs O3a through O4a, this study conducts the most sensitive search to date for continuous gravitational waves from three central compact objects in supernova remnants, setting unprecedented constraints on their ellipticity and crustal anisotropy while identifying a single surviving candidate from G347.3-0.5 that warrants further investigation with upcoming data.
This paper analyzes the disk path integral of timelike Liouville theory as a two-dimensional toy model for quantum cosmology, computing one-loop wavefunctions in the fixed extrinsic curvature representation, conjecturing all-loop expressions, and proposing a well-defined inner product for Euclidean histories through the pairing of these path integrals.
This paper demonstrates that in Weyl-invariant Einstein-Cartan gravity, assumptions regarding post-inflationary reheating temperature and the equation-of-state parameter significantly influence predicted inflationary observables, thereby necessitating their consistent inclusion in phenomenological analyses.
This paper proposes a mathematically rigorous, exact solution to the Einstein field equations for a three-region gravastar model, offering a self-consistent alternative to classical black holes as the end state of gravitational collapse.
This paper extends Jacobson's thermodynamic derivation of gravity by introducing a novel entropy functional incorporating quantum horizon properties, which yields a modified gravity theory that resolves early-universe singularities through a nonsingular de Sitter phase and reproduces loop quantum cosmology dynamics at late times.
This paper investigates spin-0, 1, and 1/2 field perturbations of four-dimensional Einstein-Skyrme anti-de Sitter black holes by computing quasinormal modes, greybody factors, and strong cosmic censorship parameters, revealing a Konoplya-Zhidenko anomaly in the first overtone and demonstrating that the Christodoulou parameter remains well below the censorship threshold due to the theory's intrinsic constraints.
This paper investigates homothetic Killing vectors in generic Vaidya-like spacetimes, demonstrating that such vectors exist under specific linear parameter conditions, which allows for the conformal mapping of dynamical spacetimes to stationary ones to facilitate the study of homothetic Killing horizons, their thermodynamic properties, and particle creation.
This paper utilizes gravitational wave observations of the GW241011 event to simultaneously test deviations in the spin-induced quadrupole and octupole moments of compact binary components, finding no evidence against the Kerr hypothesis and establishing the first constraints on spin-induced octupole moments.