3256 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 investigates the observed scarcity of low-mass black holes in Gaia's wide astrometric binaries compared to LIGO-Virgo-KAGRA's gravitational-wave mergers, proposing that natal kicks are more likely to disrupt the progenitor systems of the former, thereby explaining the pronounced "mass gap" in the Gaia population.
This paper explores the application of operational quantum reference frames to quantum field theory on curved spacetimes, specifically demonstrating a type reduction result for algebras with thermal properties and outlining the quantization of boundary electric fluxes and gluing procedures for quantum electromagnetism.
This paper proposes that the gravitational wave spectra generated during the plunge phase of extreme mass-ratio events can distinguish black hole mimickers from standard black holes by exhibiting a low-frequency comb of sharp resonances and a qualitative spectral break above a specific frequency threshold, offering a pathway to enhance detection significance through the coherent analysis of multiple events.
This paper investigates how deviations from spherical symmetry in the -metric alter the properties of periodic orbits and their associated gravitational waveforms, demonstrating that precise measurements of waveform morphology from extreme-mass-ratio inspirals could constrain the deformation parameter .
This paper proposes that adding a dimension-six term to -Higgs inflation resolves the tension with observed high spectral index data by enabling rapid Goldstone and Higgs preheating, which successfully aligns inflationary and CMB scales.
This paper establishes a systematic WKB-based formulation for the quasinormal mode/grey-body factor correspondence in Kerr black holes, demonstrating its high accuracy for gravitational perturbations at large angular quantum numbers while identifying its breakdown in the superradiant regime.
This paper investigates the properties of periodic orbits and the resulting gravitational wave signals around a non-rotating Destounis-Suvorov-Kokkotas black hole, demonstrating how large deformations can eliminate circular orbits and alter orbital taxonomy and waveforms in ways potentially detectable by future space-based observatories.
This paper introduces the velocity coherence scale () as a redshift-independent standard ruler and a novel probe for cosmic homogeneity, demonstrating its theoretical connection to the matter-radiation equality scale and providing a preliminary measurement of approximately 132 Mpc/h using SDSS peculiar velocity data.
This paper proposes a dark QCD model featuring a 40 GeV self-interacting dark matter candidate and a light pseudo-dilaton mediator, which generates a first-order phase transition at the MeV scale to simultaneously explain the NANOGrav gravitational wave signal and resolve small-scale structure anomalies while remaining cosmologically consistent.
Using the clear gravitational wave signal GW250114, this study performs the most precise tests of general relativity in the nonlinear strong-gravity regime to date by constraining deviations in spin-precessing binary black hole mergers to significantly tighter limits than previous analyses of GW150914.