3803 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 argues that the singularity inside a black hole is a two-dimensional surface rather than a point, a conclusion supported by the causal separation of infalling observers and the mass inflation instability at the inner horizon of rotating black holes, with significant implications for the unitary evolution of quantum gravity states.
Using high-resolution Hubble Space Telescope spectra of the white dwarf G191-B2B, researchers found no evidence for temporal variation in Newton's gravitational constant, constraining its rate of change to (-0.014 ± 0.016) × 10⁻¹⁵ yr⁻¹ in a strong gravitational field.
This paper extends the finite-solid-angle general relativistic radiation transport method to time-dependent spacetimes by adopting an Eulerian Valencia-type formulation with a Cholesky-gauge tetrad, thereby enabling accurate and robust simulations of radiative processes in dynamical, strongly gravitating systems such as circumbinary disks.
This paper proposes a specialized mean-field stochastic gradient variational Bayes (SGVB) method that offers a scalable and computationally efficient alternative to Hamiltonian Monte Carlo for estimating the spectral density matrices of long-duration, multivariate LISA noise while maintaining high accuracy.
This paper presents a time-domain simulation of environmental noise in the Einstein Telescope's proposed triangular configuration, revealing that correlated noise and coincident glitches significantly limit its observational capabilities and the utility of its null stream.
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.