2489 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 resolves controversies regarding the particle spectrum of pure gravity by demonstrating through a full Hamiltonian analysis that while the theory propagates three degrees of freedom globally, its linearized spectrum around Minkowski and other spacetimes is empty due to a constraint degeneracy that renders these backgrounds surfaces of strong coupling, although the universe can still evolve through such singularities.
This paper constructs the graviton propagator in de Sitter space within a generalized one-parameter non-covariant gauge family, providing a simplified form to facilitate future checks of gauge dependence in one-loop computations and proposed observables.
This paper revisits Einstein-Kalb-Ramond gravity to derive two distinct classes of exact static black hole solutions with general topological horizons in diverse dimensions, analyzes their thermodynamic properties using the Wald formalism to establish the first law and clarify the role of Noether mass, and discusses the observational implications of these findings.
This paper presents analytical solutions for cylindrically symmetric black holes and strings sourced by Dekel-Zhao dark matter, revealing that the dark matter profile induces curvature singularities, violates the dominant energy condition in lower dimensions, and critically influences horizon formation and thermodynamic stability through its inner slope parameter.
This paper proposes that black holes function as condensates of spacetime's thermodynamic degrees of freedom, offering a coherent interpretation of their mass, entropy, and interior structure that is supported by recent black hole merger observations.
This paper investigates the quasinormal modes of Proca and Maxwell fields in -dimensional Schwarzschild-AdS black holes by combining numerical methods and analytic approximations to derive frequency spectra, notably discovering purely imaginary low-frequency scalar-type Maxwell modes in large dimensions that correspond to hydrodynamic regimes in the dual conformal field theory.
This paper reviews classical energy conditions and their role in singularity theorems, then examines how quantum fields violate these conditions and explores modern constraints—such as spacetime averaging and quantum information bounds—that guide our understanding of semi-classical gravity and quantum gravity.
This paper demonstrates that within classical general relativity, non-static flat and open Friedmann--Robertson--Walker cosmologies satisfying the averaged null energy condition cannot be geodesically complete due to a sign obstruction, whereas closed models with positive curvature can support nonsingular, geodesically complete evolutions with ordinary matter.
This paper demonstrates that two static spacetimes, previously claimed to be vacuum solutions derived from a Schwarzschild--Bertotti--Robinson seed, actually harbor a hidden semi-infinite annular mass distribution on the equatorial plane when analyzed in Weyl coordinates, revealing a coordinate singularity that explains the finite affine parameter of equatorial null geodesics reaching infinity.
This paper applies Bogolyubov theory to group field theory condensates to demonstrate that quantum fluctuations beyond the mean-field regime manifest as collective excitations analogous to phonons, thereby deriving leading corrections to emergent Friedmann cosmology and establishing a controlled link between microscopic quantum gravity and macroscopic spacetime dynamics.