3949 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.
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.
This paper extends the gradient expansion formalism to fermionic axion inflation, demonstrating that Schwinger pair creation of charged fermions damps gauge-field production and attenuates the gravitational wave signal, thereby allowing observable signals from LISA and ET to be compatible with constraints while identifying a new damped oscillatory backreaction regime.
This paper presents a comprehensive comparison of gravitational wave inference methods, demonstrating that the Derivative Approximation for Likelihoods (DALI) offers a significantly more accurate and computationally efficient alternative to traditional MCMC and Fisher Matrix approaches, while introducing the public \texttt{GWDALI} code to facilitate rapid and precise posterior estimation for next-generation observatories.
This paper extends the cosmological bootstrap program to scale-breaking scenarios by deriving integro-differential boundary equations with memory kernels for heavy fields with time-dependent masses, enabling analytical and numerical solutions that reveal exponentially enhanced primordial features in the squeezed bispectrum.
This paper introduces a physics-informed neural network framework that learns Post-Newtonian corrections from a minimal set of numerical relativity waveforms to create a computationally efficient, differentiable bridge between analytical approximations and full numerical simulations, significantly improving waveform accuracy for compact binary coalescences.
This paper presents an analytical study of the interior structure of 3D hairy rotating black holes, revealing a complex dynamics characterized by an infinite sequence of analytically describable Kasner epochs that ultimately evolve into a curvature singularity.