2575 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 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.
This paper investigates solutions to the Einstein-Dirac equations demonstrating that a classical spinor field can condense into a delta-like distribution concentrated specifically at the event horizon of a black hole.
Using the gradient expansion formalism, this paper presents a detailed parameter scan of gravitational wave production in pure axion inflation and finds that detectable signals require strong backreaction regimes that conflict with current constraints on dark radiation (), thereby defining a critical target for future lattice studies.
By analyzing 275 numerical relativity simulations, this study demonstrates that while leading-order post-Newtonian amplitude structures persist through the merger for certain modes, low-degree polynomial corrections to these post-Newtonian Ansätze are sufficient to accurately capture strong-field behavior across the inspiral, merger, and post-merger phases for efficient waveform modeling.
This paper resolves discrepancies in the literature regarding ultraviolet divergences in cosmological correlators by demonstrating that various renormalization schemes yield consistent, unitary results and establishing a practical framework where the imaginary part of one-loop wavefunction coefficients is universally fixed by the logarithmic running of the real part.
This paper introduces Kerr generating functions within a heavy particle effective theory framework to linearize propagators and exponentiate numerators, enabling the derivation of compact all-loop scattering results for probes on Kerr black holes and providing a full four-loop calculation of leading non-linear tidal effects for neutron stars.
This paper investigates how Rényi entropy constraints affect the merger of equal-mass black holes in five-dimensional Gauss-Bonnet Anti-de Sitter spacetime, revealing that the Gauss-Bonnet term significantly alters merger mass bounds compared to General Relativity, specifically weakening them for zeroth-order Rényi entropy and strengthening them for higher orders.