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 contribution develops a covariant, gauge-invariant framework for deriving linear perturbation equations on an averaged cosmological background driven by backreaction effects and demonstrates that neglecting the coupling between structure formation and effective fluid perturbations can lead to distorted predictions, even in models that successfully fit background observational data.
By performing general-relativistic simulations, the authors demonstrate that the "favoured" branch of twin stars in a mass-radius sequence is determined by which configuration can withstand larger perturbations before migrating to the other branch, a property that can be predicted using binding energies rather than full simulations.
This study investigates how the increase in symmetry energy and chaotic magnetic fields influence the structural properties and gravitational wave observables of neutron stars, and demonstrates that magnetic fields significantly soften the equation of state for low-mass stars and markedly reduce their tidal deformability.
This paper analyzes cosmological perturbations and structure formation within the Extended Proca-Nuevo (EPN) framework, demonstrating how a massive spin-1 vector field modifies the universe's expansion history and gravitational potentials while maintaining the standard form of the matter growth equation.
The paper proposes that kinetic mixing between QCD and a hidden-sector three-form gauge field generates an effective shift in the angle, thereby inducing CP-violating effects and potentially impacting standard solutions to the strong CP problem.
This paper proposes a data-driven approach using Gaussian Process Regression to accelerate the reduction of orbital eccentricity in binary black hole simulations, significantly reducing computational costs by predicting optimal initial parameters from existing simulation archives.
This paper develops a minisuperspace formulation of the classical double copy for anisotropic Lifshitz spacetimes, demonstrating that the relationship between gravity and gauge theory can be captured through a universal radial operator and an effective potential that accounts for anisotropic scaling and higher-curvature corrections.
This paper proposes a thermodynamic-optical duality framework that re-parameterizes black hole mass using the observable shadow radius, allowing for a direct comparison between classical lensing and quantum evaporation to distinguish between Kerr and modified gravity models (MOG and Horndeski) using EHT observations.
This paper applies caustic skeleton theory to Bayesian reconstructions of the Local Universe to reveal a multi-scale classification of cosmic structures, demonstrating that the Pisces-Perseus ridge is dominated by D_4 umbilic caustics while the Coma Cluster region is characterized by A_4 swallowtail caustics, thereby offering a novel topological distinction between these prominent weblike features.
This paper proves that the potential previously identified for a scalar-field FLRW universe is the most general local potential allowing for non-trivial conformal Killing vectors by demonstrating that all other mathematical solutions to the integrability conditions are either singular or incompatible with the full equations.