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 presents a comprehensive wave-optics model demonstrating that hollow silicon-carbide corner-cube retroreflectors offer superior mass efficiency and competitive photon return for high-precision lunar laser ranging, while revealing a critical trade-off where smaller apertures are better suited to mitigate flux loss caused by velocity aberration.
This paper derives new analytic static black hole solutions in dark photon models with higher-order magnetic dipole interactions, demonstrating how spin-dependent terms and massive dark photon effects significantly modify horizon properties, Hawking temperature, and black hole shadows to enable future phenomenological tests via gravitational wave astronomy and imaging.
This paper investigates two models of interacting scalar fields in Einstein scalar Gauss-Bonnet gravity as unified dark energy and dark matter candidates, demonstrating that while they align with current supernova data and the CDM model, they show a statistically significant preference over CDM when incorporating future Roman Space Telescope mock data at higher redshifts.
This paper introduces version 2.1 of the public Python code PRECESSION, which extends its capabilities to model the post-Newtonian dynamics of precessing black hole binaries on eccentric orbits through a semi-automatic adaptation method and new averaged evolutionary equations.
This paper presents relativistic -body simulations demonstrating that the sign-switching CDM model produces a distinct, redshift-dependent enhancement in the nonlinear matter power spectrum at group and poor-cluster scales, offering a unique, falsifiable signature that differentiates it from standard CDM and potentially aligns with the observed peak in cosmic star formation.
This paper investigates inflationary models where diffeomorphism invariance is broken down to transverse diffeomorphisms, deriving modified slow-roll parameters and power spectra that are tested against CMB data while revealing novel post-inflationary dynamical regimes distinct from standard diffeomorphism-invariant theories.
Using 3D GRMHD simulations, this study demonstrates that incorporating anisotropic non-thermal electrons accelerated by magnetic reconnection during black hole flux eruptions is essential for accurately interpreting time-variable EHT observations, as these particles drive flux outbursts and localized brightening while significantly modulating linear polarization fractions and image morphology through pitch-angle-dependent beaming and enhanced absorption effects.
This paper resolves contradictions regarding Maldacena-Shenker-Stanford chaos-bound violations in black hole spacetimes by establishing a self-consistent framework that distinguishes between apparent violations caused by inconsistent angular momentum parameter choices and genuine physical violations arising from higher-order curvature corrections.
This paper develops a position-space cosmological perturbation theory in a generalized harmonic gauge to model localized primordial gravitational wave sources, deriving an exact hypergeometric Green's function for power-law cosmologies that enables closed-form expressions for metric perturbations up to quadrupolar order while highlighting the non-compact nature of such sources due to fluid fluctuations.