3919 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 establishes a quantitative trade-off derived from unitarity and semiclassical assumptions, proving that any observable exterior quantum hair on a black hole necessarily implies a quantifiable violation of horizon smoothness, thereby demonstrating that the no-hair theorem and exact horizon smoothness are mutually incompatible under unitary evolution.
This paper proposes a method to identify host galaxies of compact binary mergers by focusing on the most luminous galaxies within gravitational-wave localization volumes, demonstrating that for well-localized events, this approach significantly narrows down candidate hosts to a small number with a low probability of random association, thereby enabling future constraints on merger formation histories and Hubble constant measurements.
This paper constructs an analytic continuation of Darwin variables to provide a unified, real parametrization for all types of Schwarzschild geodesics—including bound, scattering, and plunging trajectories—and demonstrates their utility in tracking orbital evolution across the separatrix using a single phase variable.
This paper demonstrates that the zero-mass limit of the partition function for covariant locally localized gravity on a Karch-Randall braneworld yields a theory containing a massless graviton and a decoupled massive vector, rather than the standard Randall-Sundrum II model, by deriving a fully covariant description to compute the one-loop partition function.
This paper argues that while physical theories are coordinate-independent, the specific choice of coordinate frames in static axisymmetric vacuum spacetimes significantly influences the effective potential and observable phenomena, such as rotation curves, thereby necessitating a careful review of local and global symmetries to correctly interpret observations within general relativity.
This paper investigates the optical appearance and shadow characteristics of scalar hairy black holes with an inverted Higgs potential using ray-tracing and thin accretion disk models, revealing that while increasing the scalar field at the horizon enlarges the shadow and disk size, the brightness remains similar to Schwarzschild black holes, allowing for potential mimicry and enabling constraints on the potential parameter using M87 and Sgr A* observations.
This paper proposes an effective thermodynamic model for a black hole's interior composed of scalar quasiparticles, distinguishing between a dense core governed by a potential-energy functional and an inverse-temperature-like parameter, and a surrounding crust with finite kinetic temperature, to provide a unified framework for exploring singularity resolution and the thermodynamic origins of negative pressure and energy density.
This contribution develops a multi-parametric formalism inspired by vacuum perturbation theory to model the orbital evolution and gravitational wave emission of asymmetric compact binary systems in realistic astrophysical matter distributions by reducing the complex dynamics to wave equations resembling the vacuum case.
This paper derives an explicit formula for spherically symmetric solutions to the Klein-Gordon equation in a de Sitter expanding universe and applies these results to analyze the temporal decay of fields generated by a pionic atom.
This contribution presents a theory-independent, geometric analysis of the interior of Schwarzschild black holes, demonstrating that dynamical evolution generically produces new singularities absent in static configurations, thereby imposing stringent constraints on gravitational collapse.