3255 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 reports a 100-fold improvement in sensitivity for detecting new gravity-like forces at micrometer scales using optically levitated microspheres, establishing the first multi-component vector force measurements and setting stringent new upper limits on Yukawa-type interactions in the 5–10 μm range.
This paper introduces a new set of non-orbit-averaged, gauge-invariant post-Newtonian equations up to 2.5 order that accurately describe the non-adiabatic evolution of eccentric black-hole binaries across all eccentricities, revealing the limitations of traditional orbit-averaged approximations like Peters' equations at the first pericenter passage.
This study extends the material medium approach to the Kerr-Sen black hole spacetime in heterotic string theory by deriving the refractive index from frame-dragging effects to calculate and compare the gravitational deflection of light with Kerr and Schwarzschild solutions.
This paper establishes a rigorous quantum optical framework for analyzing diffraction-induced vacuum field injection in DECIGO's Fabry-Perot cavities, demonstrating that while such losses slightly increase radiation pressure noise, cavity detuning combined with homodyne detection and optical-spring locking can effectively mitigate these effects to enhance the detector's sensitivity to primordial gravitational waves.
This paper demonstrates that classical-quantum gravity theories based on completely positive dynamics can be embedded into a fully quantum framework and, as a consequence, can violate fundamental conservation laws like angular momentum even when the underlying equations are rotationally symmetric.
This paper analyzes DESI DR2 data using a model-independent method to present potential evidence for physics beyond the standard CDM model, specifically suggesting a temporary acceleration of the universe's expansion at , a subsequent deceleration at , and a dark energy equation of state parameter less than -1 at .
This paper presents a systematic framework for deriving non-relativistic effective field theories from relativistic theories with generic, potentially non-analytic self-interactions, establishing an effective fluid description and extending the formalism to cosmological settings to analyze ultra-light dark matter models, boson stars, and dark matter halo cores.
This paper investigates a specific gravity model with effective curvature-matter interaction, demonstrating through statistical analysis of distance modulus data and a comparative study of early-Universe epochs that it predicts an earlier onset of structure formation and a higher matter-radiation equality redshift than standard CDM cosmology while remaining consistent with observed recombination data.
This paper investigates the Lorentzian gravitational path integral for 4D Gauss-Bonnet gravity, demonstrating that complex deformation of the coupling effectively resolves degeneracies arising from anti-linear symmetries and ensures compatibility with the KSW criterion for No-boundary geometries.
This paper provides an exact analytical solution for gravitational wave propagation in ghost-free bimetric gravity during a late-time de Sitter epoch, deriving new observational bounds from GW170817 and demonstrating that massless and massive graviton components maintain coherence even when temporally resolved.