3158 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 static and spherically symmetric black holes with non-minimal couplings between curvature and the electromagnetic field, demonstrating that while all such couplings enlarge the event horizon and photon sphere, they produce distinct observational signatures in shadow size and photon ring separations that could provide new evidence for modifications to gravity.
This paper demonstrates that combining multiple lensed images of strongly lensed gravitational wave sources significantly improves sky localization accuracy, with the most substantial gains achieved by merging just two images, thereby facilitating effective multimessenger follow-up and host galaxy identification.
This study investigates the optical, dynamical, and radiative properties of an Euler-Heisenberg black hole surrounded by perfect fluid dark matter, revealing that while the black hole's charge and the dark matter parameter significantly influence phenomena like shadow size and quasinormal modes, the dark matter environment provides the dominant imprint on the system's phenomenology.
This paper offers a self-contained introduction to correlation geometry as the foundation of causal fermion systems, emphasizing its treatment of gauge transformations and unitary equivalence while arguing that this framework conceptually aligns more closely with thermodynamics than with standard quantum theory.
This paper interprets three recently discovered conserved quantities for timelike geodesics in Schwarzschild spacetime as arising from hidden symmetry transformations via Noether's theorem, demonstrating that these transformations, together with standard Killing isometries, form the complete Noether symmetry group for equatorial orbits.
This paper presents new models of hot neutron star atmospheres composed of thermonuclear ashes (helium, chromium, iron, or nickel) that incorporate extensive spectral line data and Compton scattering to reveal a radiation-pressure-induced flux limit and provide spectral fitting constraints for X-ray bursts observed in systems like HETE J1900.1–2455 and GRS 1747–312.
This paper establishes a unified effective framework that decouples rigorous mathematical bounds from phenomenological models to describe the vacuum trace in self-similar Casimir systems, demonstrating that the integrated vacuum trace is proportional to the logarithmic running of a scale-dependent Casimir coefficient while distinguishing this macroscopic backreaction from local trace anomalies.
This paper explicitly derives the memory effect for Robinson-Trautman waves by constructing a locally asymptotically flat frame and an improved mass aspect, revealing that news-free solutions correspond to boosted Schwarzschild black holes while demonstrating the BMS covariance of displacement and non-linear memory effects.
This paper introduces a reference-renormalized Gauss-Bonnet formalism that resolves gauge ambiguities in finite-distance gravitational lensing by defining curvature primitives relative to a physically chosen reference geometry, thereby unifying the calculation of deflection angles in static spherical spacetimes—including cases lacking photon spheres—while maintaining consistency with traditional orbit-normalized methods.
This paper formulates a first-order thermodynamic description of Jordan-frame multi-scalar-tensor gravity by deriving an exact covariant decomposition that interprets the geometric sector as an effective imperfect fluid, introduces new scalar diagnostics to characterize multi-field thermal dynamics, and establishes that freezing the effective coupling is generally a weaker condition than full relaxation to General Relativity.