3805 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 introduces \textsc{Genova}, a probabilistic framework utilizing conditional normalizing flows to predict kilonova spectra and light curves directly from gravitational wave-inferred binary neutron star parameters, successfully reproducing observed data from GW170817/AT2017gfo while accounting for both source uncertainty and model variations.
This paper investigates warm inflation in non-minimally coupled scalar-tensor gravity within the defining frame, revealing that modified-gravity effects can suppress dissipation and allow quantum perturbations to dominate over thermal fluctuations even in high-temperature regimes, while providing benchmark models consistent with current CMB constraints.
This paper investigates how thermal Krylov complexity and K-entropy of primordial perturbations evolve under canonical inflation, non-trivial sound speed, and modified dispersion relations, revealing that distinct quantum information signatures arising from comoving momentum corrections and system dissipation can serve as effective probes for discriminating quantum gravity effects in inflationary cosmology.
This paper demonstrates that while intrinsic alignments alone offer limited improvement in constraining primordial dipolar power spectrum asymmetry, their cross-correlation with galaxy clustering can contribute up to half the constraining power of clustering alone, particularly for high-density Stage IV surveys like Euclid, while remaining robust against marginalization of bias parameters.
This paper introduces Flow-Matching MCMC (FM-MCMC), a novel Bayesian framework combining continuous normalizing flows with parallel tempering to overcome the computational inefficiency and local-trapping issues of traditional methods, thereby enabling robust, unbiased, and scalable parameter estimation for extreme-mass-ratio inspirals in future space-based gravitational-wave missions.
This paper outlines how the Square Kilometre Array (SKA) will revolutionize tests of gravity in the strong-field regime by significantly improving the timing precision of known binary pulsars and discovering new relativistic systems, such as pulsar-black hole binaries, to probe fundamental theories like General Relativity, the strong equivalence principle, and the no-hair theorem.
This paper presents a novel method that combines rapid low-latency parameter estimates from the \texttt{simple-pe} algorithm with posterior repartitioning to significantly accelerate Bayesian gravitational-wave inference for high signal-to-noise ratio events while mathematically guaranteeing results identical to standard uninformed analyses.
This paper introduces a new parameterization for the Ovcharenko-Podolský family of black hole solutions to eliminate negative mass pathologies and ensure thermodynamic consistency, then extends this framework via Harrison transformation to derive a more general family of exact Einstein-Maxwell solutions describing black holes immersed in combined Bertotti-Robinson and Bonnor-Melvin electromagnetic fields.
This paper calculates five-point tree-level Compton amplitudes for minimally coupled spinning matter in gauge theory and gravity using the massive spinor-helicity formalism, BCFW recursion, and KLT relations, providing exact results that generalize previous work to higher-point cases and are relevant for modeling binary black hole systems in the post-Minkowskian expansion.
This paper develops a perturbative framework to test MOND-like gravity modifications against cosmological data, finding no statistically significant evidence for deviations from the standard CDM model while establishing a systematic method to constrain such theories using growth-rate measurements and one-loop power spectrum corrections.