3207 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 employs a perturbative analysis of polynomial-type spatially covariant gravity Lagrangians up to cubic order around a cosmological background to derive specific coefficient conditions that eliminate the scalar mode, thereby identifying five explicit models that propagate only the two tensorial degrees of freedom characteristic of general relativity.
This paper proposes that negative densities of states in the 3D gravitational path integral can be cured by incorporating spinning states interpreted as bulk defects and overspinning BTZ geometries, which arise from mixed elliptic-hyperbolic identifications and exhibit causal pathologies despite being smooth pure gravity quotients of AdS.
This paper investigates the gravitational lensing signatures of Hayward-like regular black holes, finding that while weak-field effects are negligible and the asymptotic strong-field position matches the Schwarzschild case, future high-precision measurements of strong-lensing observables like angular separations and time delays could potentially distinguish these regular black holes from standard Schwarzschild black holes.
This paper develops integration-by-parts reduction and differential equations for massive loop integrals in de Sitter spacetime, revealing a parity-split IBP structure, formulating a Baikov representation, and verifying a conjecture that Hankel-function-based integrands yield -form differential equations.
This paper extends the pole-skipping framework from static to rotating spacetimes, demonstrating that bulk geometries can be fully reconstructed from boundary data by introducing "angular pole-skipping" for non-radial components and revealing that vacuum Einstein equations and energy conditions manifest as algebraic constraints on this data.
This paper demonstrates that incorporating Einstein-Gauss-Bonnet gravity with specific non-minimal coupling functions (exponential and hyperbolic secant) successfully reconciles quintessential inflation models with recent Atacama Cosmology Telescope constraints on the scalar spectral index and tensor-to-scalar ratio, while also establishing viable reheating scenarios consistent with Big Bang nucleosynthesis.
This paper analytically demonstrates that backreaction from analog Hawking radiation in a Bose-Einstein condensate with a step-like configuration causes the entanglement entropy of the radiation to decrease for low-energy modes, thereby providing a microscopic, unitary realization of the Page curve.
This paper investigates the timelike circular geodesics of spherically symmetric Weyl black holes by analyzing their effective potentials and assessing the Jacobi and Lyapunov stability of these orbits to provide new insights into the stability properties of Weyl conformal gravity and the influence of its free parameters.
This paper establishes the first proof of nonlinear Landau damping for charged self-interacting plasmas in an expanding Newtonian cosmological setting, demonstrating that charge density contrasts decay superpolynomially for small Gevrey-class perturbations when the scale factor grows as with .
This paper establishes a unified first-order eikonal framework that analytically connects the metric of a scalarized black hole to its quasinormal modes, shadows, strong lensing, and grey-body factors by deriving closed-form expressions for photon-sphere invariants and demonstrating their spin-universal applicability across test fields.