4428 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 demonstrates that gravitational self-interactions can continuously generate and sustain quantum squeezing in light axion dark matter despite decoherence, thermal fluctuations, and dephasing, suggesting that dark matter may retain persistent quantum features relevant for detection.
This paper establishes the positivity of the group-averaging inner product for perturbative quantum gravity in global de Sitter space with under specific particle-weight convergence conditions, while also revealing that states with smaller weights can yield negative norms, thereby clarifying the viability of this approach for resolving constraints in de Sitter quantum gravity.
This paper proposes the framework of Cosmological Classical Branches (CCBs), which explains how distinct late-time matter components act as compatible physical records of primordial curvature perturbations, thereby rendering a single classical realization physically meaningful through decoherence while preserving the global quantum superposition.
This study extends bulk viscosity calculations for neutron-star merger matter to include isobars, revealing that their presence alters the charge composition to open nucleonic direct Urca processes, thereby shifting the resonant bulk viscosity maximum to lower temperatures and significantly enhancing the damping of kHz density oscillations compared to purely nucleonic matter.
This study demonstrates that in rotating Weyl conformal gravity black holes, increasing spin and higher-order curvature corrections ( and ) destabilize photon orbits by breaking invariant tori and inducing a transition from regular to chaotic dynamics, thereby offering nonlinear photon motion as a potential probe for deviations from General Relativity in strong gravitational fields.
This paper investigates how particle spin, Lorentz symmetry breaking via Bumblebee gravity, and the cosmological constant collectively modulate chaos bound violations in static spherically symmetric black holes, revealing that spin offers a new mechanism for regulating critical angular momentum while Lorentz violation suppresses violations and a negative cosmological constant alters both the violation region and magnitude.
This paper derives exact solutions for a charged Bardeen black hole incorporating a cosmological constant, quintessence, and a cloud of strings, while analyzing the resulting Kretschmann scalar, geodesics, and effective potential.
This study evaluates three gravity models using Bayesian analysis of diverse cosmological data, finding that while they can partially alleviate the and tensions, mild internal data inconsistencies currently limit their statistical preference over the standard CDM model.
This paper presents a unified harmonic framework that combines gravitational wave–galaxy cross-correlation with spectral sirens to enable precise, scalable cosmological inference of parameters like and using next-generation detectors, offering a statistically efficient alternative to traditional hierarchical Bayesian methods.
This simulation study demonstrates that incorporating realistic large-scale structure clustering into gravitational wave "dark siren" analyses significantly enhances the precision of Hubble constant () measurements, enabling robust recovery with as few as 40 events and proving that improved detection capabilities are more critical than achieving complete galaxy catalogues.