2488 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 framework for the secular evolution of extreme mass-ratio inspirals crossing accretion disks around supermassive black holes, revealing that relativistic orbital dynamics and specific disk prescriptions significantly alter the two-stage alignment and eccentricity damping process compared to purely Keplerian models.
This paper derives an analytical approximation for the graviton propagator within Asymptotic Safety, demonstrating that the theory preserves General Relativity's field content without introducing extra poles or violating unitarity and causality, as spurious poles vanish in the limit of higher-order derivative expansions.
This paper distinguishes ghosts from unstable particles in quantum field theory by analyzing their differing analytic structures and temporal behaviors, demonstrating that while ghosts survive asymptotically without decaying, they lack a particle interpretation due to multi-particle interference, thereby supporting the conclusion that freely propagating ghost particles do not exist in the asymptotic limit.
This study demonstrates that the Early Dark Energy model, when constrained by a combination of Planck, ACT, SPT, DESI, and JWST data, successfully alleviates the Hubble tension to the level while providing a statistically superior fit to high-redshift galaxy observations compared to the standard CDM model.
This study demonstrates that the proposed CHRONOS detector is a viable platform for characterizing dominant Rayleigh-wave-induced gravity-gradient noise and detecting prompt gravitational signals from nearby earthquakes (e.g., Mw 5.2 within 90 km) in the sub-Hertz frequency regime, offering a unique capability to observe geophysical gravity perturbations before seismic waves arrive.
This paper demonstrates through full Bayesian parameter estimation that the nested triangular (ET-Î) design of the Einstein Telescope outperforms the separated L-shaped (ET-2L) configuration in estimating binary black hole parameters, primarily because its redundant geometry ensures multi-detector operation more frequently, leading to tighter constraints on luminosity distance and component masses even during periods of partial network availability.
This paper derives a distinct analytic form for the near-horizon linear polarization of synchrotron emission in Kerr spacetime, demonstrating that the leading-order pattern depends on black hole spin and source angle while higher-order corrections encode electromagnetic field structure, thereby extending previous equatorial and off-equatorial analyses to offer a new probe of rotating black holes and gravito-electromagnetic interactions.
This paper presents a universal, closed-form expression for the dynamical Love numbers of Schwarzschild black holes that holds to all orders for any spin and multipole, revealing a factorized structure rooted in near-zone anomalous dimensions and far-zone Newtonian phase effects, which is independently verified using shell effective field theory up to .
This paper proposes a horizonless, regular ultra-compact object model arising from non-minimal curvature-fluid coupling that mimics black hole phenomenology with a Schwarzschild exterior and a vacuum-like interior, naturally selecting a specific mass-radius window while predicting a unique shell temperature and mass-independent luminosity.
Using the curl-mode CMB lensing power spectrum from the Atacama Cosmology Telescope DR6 data, the study establishes the tightest constraints to date on cosmic string tension and inter-commutation probability, improving previous limits by nearly an order of magnitude.