3805 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 supersymmetric near-horizon geometries in gauged D=5 supergravity coupled to vector multiplets inherently possess a second rotational Killing field on compact horizon sections, thereby unifying known black hole solutions and explicitly characterizing two distinct sub-branches of varying moduli without assuming rotational symmetry a priori.
This paper systematically analyzes Weyl's class of static, axisymmetric spacetimes using canonical forms of rank-2 Killing tensors to demonstrate that no vacuum or electrovacuum members with two Killing vectors admit irreducible Killing tensors, thereby establishing a direct link between the absence of hidden symmetries and the breakdown of complete integrability in algebraically general (Petrov type I) geometries.
This paper demonstrates that employing a nonlocal UV completion allows for the derivation of a fully convergent, closed-form Schwinger-parameter representation of the four-loop Higgs-gluon form factor, enabling direct numerical evaluation without standard UV subtractions while maintaining consistency with the coupling scheme in the local limit.
This paper demonstrates that for specific quadratic torsion subsectors on maximally symmetric and flat backgrounds, the one-loop effective actions and local divergences of Poincaré gauge theories with propagating torsion remain identical between their diffeomorphism-invariant and unimodular formulations, indicating that the unimodular constraint does not alter local one-loop torsion dynamics in these cases.
This paper proposes that a second law of quantum complexity, which dictates that complexity grows toward an exponential saturation value in equilibrium but can decrease out of equilibrium, is derivable from a quasistatic information quantization rule linked to the principle of least action and minimum entropy production.
This paper presents a same-family fixed-band closure theorem that derives geometric observables, including a uniquely induced Newton coefficient and a conserved stress tensor for semiclassical FLRW evolution, from a single quantum family without ad hoc interface fitting, while explicitly delineating the specific inputs and limitations of this controlled benchmark for quantum gravity.
This paper demonstrates that the Laplace-space representation enables an analytical solution for primordial non-Gaussianities in the strong mixing regime of multifield inflation, revealing that the resulting cosmological collider signal is significantly larger than previously estimated due to reduced Boltzmann suppression.
This paper investigates the gravitational lensing of light rays near a marginally unstable photon sphere at a -symmetric wormhole throat, demonstrating that the deflection angle diverges with a power law rather than the typical logarithmic behavior found in black holes, and validates this universal property across various wormhole spacetimes through numerical and semi-analytic methods.
Using LIGO, Virgo, and KAGRA data through April 2025 and implementing new frequency-domain cuts to mitigate spectral noise, the collaboration found no evidence of an isotropic stochastic gravitational-wave background, setting improved upper limits on its energy density and predicting a compact binary background amplitude of at 25 Hz based on the GWTC-5.0 catalog.
This paper calculates the complex-valued dynamical tidal response coefficients for 2+1D analogue black and white holes in rotating bathtub flows, revealing that the black hole's tidal Love number exhibits logarithmic running while its white hole counterpart's response is the complex conjugate of the black hole's.