3256 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 outlines the site selection constraints and viable deployment options for the LILA-Pioneer and LILA-Horizon lunar gravitational wave detectors, demonstrating that while their scientific return is independent of location, practical requirements such as seismic isolation, environmental protection, and accessibility significantly narrow the range of suitable lunar sites.
This paper demonstrates that by engineering a cylindrical cavity, the interplay between boundary conditions and uniform acceleration can suppress decoherence in quantum detectors, effectively using Unruh thermality to enhance rather than degrade quantum coherence.
Using DESI-DR2 angular diameter distance measurements and various Type Ia supernova luminosity distance compilations, this paper confirms the validity of the Etherington relation and constrains the evolution of supernova absolute magnitudes to , thereby validating fundamental gravity assumptions and offering a robust method to mitigate systematic errors in dynamical dark energy analyses.
This paper derives exact general relativistic solutions for cylindrically symmetric spacetimes filled with a perfect fluid obeying a linear equation of state, specifically obtaining explicit metric functions for stiff fluid () and other cases across three distinct geometric scenarios to provide a framework for modeling anisotropic cosmologies and early-universe dynamics.
This paper numerically demonstrates that coupling a five-dimensional Proca-Maxwell system to an infinite tower of higher-derivative gravity regularizes spacetime singularities and produces globally regular black hole mimickers satisfying all energy conditions, characterized by a "frozen" supercritical state that is "unfrozen" by electrostatic repulsion.
This paper proposes that by resolving the inconsistency of point-particle singularities in General Relativity through spacetime surgery and deriving a covariant backreaction term, the resulting modification to local particle trajectories can naturally explain flat galaxy rotation curves without invoking dark matter.
This paper investigates Quantum Electrodynamics in two-dimensional de Sitter space, demonstrating how cosmological expansion drives the system through a pseudo-critical spectral region that governs the loss of adiabaticity, excitation growth, and the emergence of an irreversibility front detectable via local observables.
This paper proposes a single-field slow-roll inflation model featuring a sudden potential step at the end of inflation, which allows standard models like chaotic and Starobinsky inflation to produce a scale-invariant primordial spectrum () consistent with early dark energy solutions to the Hubble tension.
This paper argues that causal reference frames and time-delocalized subsystems are coordinate parametrizations of a single perspective-neutral object, demonstrating that while standard no-go theorems restrict unitary perspective transformations that preserve time foliation, such transformations become possible by either reshuffling past/future notions or by extending the process with quantum reference frames to provide a shared spatiotemporal scaffold.
This paper proposes that black hole mass can be reinterpreted as a topological charge arising from "bubble spacetimes" in first-order gravity, where the boundary between degenerate and nondegenerate metric phases coincides with the photon sphere and is characterized by a universal topological number, while the event horizon remains topologically trivial.