2532 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 how black hole rotation influences proper infall times in Kerr spacetime compared to Schwarzschild spacetime by analyzing equatorial timelike geodesics between surfaces of equal circumferential radius and interpreting the resulting variations through the covariant formalism, specifically showing that differences in expansion and shear drive distinct focusing behaviors for prograde and retrograde orbits.
This paper demonstrates that in gravity models, the nonlinear dependence of the coupling function on the energy-momentum trace leads to significant deviations between spatial averages and homogeneous approximations, thereby invalidating the common assumption that these quantities are equivalent and revealing that dust in such theories acquires non-vanishing proper pressure.
This paper proposes a unified framework to constrain negative masses by identifying unique gravitational-wave signatures—such as anti-chirps, dispersal, and runaway motion—that are absent in current observations, thereby providing a robust exclusion channel independent of modified gravity assumptions.
This paper investigates how higher-curvature corrections in perturbative gravity shift the photon-sphere radius and modify the black-hole shadow size, demonstrating that strong-field observables offer a sensitive probe for constraining deviations from general relativity.
This paper proposes a theoretical model and experimental scheme to detect a purely quantum gravity-induced tidal deflection, manifesting as irreducible noise in the geodesic separation of two parallel atom laser beams derived from Bose-Einstein condensates.
This paper investigates the compatibility of analogue black holes realized in platforms like superconducting quantum circuits with known dilaton gravity models, finding that current implementations do not match established theories but suggesting that the research focus should shift to deriving experimental conditions from well-known theoretical models.
The Big Mysteries Survey reveals that many foundational and controversial topics in contemporary physics, often perceived as having broad consensus, are actually supported by much narrower majorities or pluralities among physicists.
This paper introduces a traceful radiation gauge that overcomes the limitations of standard metric reconstruction for generic sources in Petrov type D spacetimes by deriving the metric trace via transport equations and determining remaining components hierarchically from Newman-Penrose equations, as demonstrated in a Schwarzschild black hole with a static shell.
This paper presents empirically grounded forecasts demonstrating that cross-correlating the stochastic gravitational-wave background anisotropy with galaxy catalogs from upcoming surveys like Euclid offers a viable path for discovery within five to ten years, significantly outperforming gravitational-wave-only detection methods.
This paper outlines the detection capabilities and scientific potential of the proposed Laser Interferometer Lunar Antenna (LILA), which aims to observe intermediate-mass black hole binaries in the deci-Hz band to probe early-universe formation, enable multi-messenger follow-up through early warnings, and conduct strong-field tests of gravity.