2575 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 generalizes McCann's seminal work by characterizing timelike Ricci curvature lower bounds in globally hyperbolic spacetimes through the convexity of relative entropy along geodesics derived from a new class of Orlicz-type Lorentzian optimal transport problems.
This paper investigates how the competing effects of a nonlinear-electrodynamics magnetic charge and a Hernquist dark-matter halo influence the quasinormal modes, shadow observables, gravitational lensing, and neutrino-pair annihilation rates of a static, spherically symmetric black hole.
This paper demonstrates that the apparent instability of cosmological perturbations in quadratic gravity is a gauge-dependent artifact rather than a physical pathology by employing a gauge-independent approach in the Einstein frame.
This paper rigorously establishes that dynamical quantum non-locality originates from the superposition principle by proving that the Wigner propagator reduces to its classical counterpart if and only if the Hamiltonian is at most quadratic, and introduces a measurable signed divergence that unifies the understanding of five distinct quantum phenomena ranging from non-local games to metrological gains.
This paper generalizes the description of primordial gravitational waves from a two-mode to a three-mode Bogoliubov transformation, revealing that while large squeezing can render the universe classical if only two modes are considered, the full three-mode analysis preserves quantum characteristics via the quantum Poincaré sphere for any non-zero squeezing or non-zero coherent state components.
The paper introduces FIREFLY, a practical Bayesian algorithm that accelerates gravitational-wave ringdown analysis with multiple quasi-normal modes by analytically marginalizing amplitude and phase parameters, thereby reducing computational time from hours to minutes while maintaining statistical rigor.
This paper presents new exact charged black hole solutions in (2+1)-dimensional gravity using a cubic non-metricity model, revealing novel asymptotically Anti-de Sitter configurations that lack General Relativity counterparts, while analyzing their unique horizon structures, softened singularities, thermodynamic stability, and orbital dynamics.
This paper demonstrates that Hamilton-Jacobi theory, when applied with appropriate solution branches, successfully describes gauge-invariant scalar perturbations transitioning from slow-roll to ultra-slow-roll inflation, revealing that the limit is unphysical for asymptotic long-wavelength solutions and refining the understanding of stochastic equations in such regimes.
This paper investigates the thermodynamic and optical properties of Einstein-Dyonic-ModMax black holes by incorporating Generalized Uncertainty Principle corrections and plasma effects, revealing that non-linear electrodynamics and quantum gravity modifications lead to stable remnants, frequency-dependent lensing signatures, and rich phase transition structures.
Using the NANOGrav 15-year data set, this study presents the first targeted searches for continuous gravitational waves from 114 active galactic nuclei, finding no significant evidence for supermassive black hole binaries but demonstrating improved sensitivity through electromagnetic priors and establishing a roadmap for future multimessenger detections.