3209 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 presents a theoretical analysis of the Wheeler-DeWitt approach to quantum cosmology extended to gravity theories with torsion, proposing a non-zero Hamiltonian framework where cosmic time is conjugate to spatial curvature and utilizing weak measurements and the de Broglie-Bohm interpretation to address wave function collapse and boundary conditions.
This paper establishes the existence and uniqueness of smooth, Ricci-flat, toric ALE and ALF gravitational instantons for every admissible rod structure and provides an elementary proof that any such toric self-dual instanton corresponds to a multi-Eguchi-Hanson or multi-Taub-NUT solution.
This paper presents a solvable effective theory for axion inflation where a heavy trace-anomaly mode dynamically flattens the potential via a closed-form Lambert- function, yielding a fully reduced one-field model that naturally satisfies current observational constraints with precise analytic control over reheating and stability.
This paper corrects the subleading coefficient in the regular-center Frobenius expansion for static tidal perturbations of relativistic stars and extends the even-parity master equation to Schwarzschild-de Sitter backgrounds, demonstrating that while the corrected coefficient alters initial data, it does not affect the extracted Love number .
This paper derives a first-order stochastic framework from the Schwinger-Keldysh formalism that systematically incorporates metric perturbations to describe non-perturbative inflationary dynamics in ultra-slow-roll regimes, validating the approach through numerical simulations of Starobinsky and critical Higgs inflation models.
This paper presents a numerical-relativity study of boson star-black hole head-on collisions, introducing a conformal-factor correction to generate stable initial data and demonstrating that higher-order gravitational-wave multipoles serve as key observables for distinguishing these mixed mergers from pure black hole binaries.
This paper introduces a novel Kontorovich-Lebedev-Fourier frequency-momentum space for de Sitter correlators derived from the decomposition of spacetime isometry group representations, which simplifies perturbative computations by transforming propagators into rational functions and recasting loop integrals as orthogonality relations among group-theoretical coefficients.
This paper demonstrates that the Aretakis instability weakens as the degree of horizon degeneracy increases, leading to the proposal of a new black hole geometry with an infinitely degenerate horizon that is stable and could serve as a final "graveyard" state for extremal black holes.
This paper demonstrates that while the Q-SC-CDM decaying dark energy model lacks stable attractor solutions under previously proposed parameter constraints, a simple alternative choice of parameters successfully yields a stable attractor with a phase portrait where all trajectories converge.