2593 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 defines Carrollian black holes as the limit of Schwarzschild-(A)dS and Schwarzschild-Bach-(A)dS spacetimes, revealing that massive particles exhibit finite or infinite windings near the extremal surface depending on the theory, while the resulting thermodynamics resemble an incompressible system with divergent entropy and a variable specific heat at zero temperature.
This paper demonstrates that the spherically symmetric collapse of a uniform dust star in Quadratic Gravity inevitably leads to horizon formation and a singularity that forms faster than in General Relativity, despite the theory's rich phase space of static solutions.
This paper proposes that the Starobinsky inflation model generates a unique, high-frequency stochastic gravitational wave background during reheating via scalaron decay, which could be detected through resonant cavity searches for graviton-to-photon conversions, thereby offering a novel experimental test for the theory.
This paper investigates gravitational wave signals in a non-supersymmetric SO(10) grand unified model, demonstrating that the first step of symmetry breaking can induce a first-order phase transition producing a detectable background, though current experimental sensitivity remains insufficient for observation.
This paper presents a machine learning framework that utilizes Gaia DR3 data and supervised learning techniques to efficiently detect and classify wide binary star systems with high accuracy, offering a scalable tool for future astrophysical research.
This paper corrects a previous error regarding the lower bound on the Brans-Dicke coupling parameter in generalized Brans-Dicke- theories by reanalyzing gravitational radiation data from the binary system PSR J1012+5307, thereby establishing revised constraints that highlight the distinct role of in the presence of both massless and massive scalar fields.
Motivated by the Hubble tension, this study utilizes DESI DR2 and ACT DR6 data to constrain the varying electron mass and early dark energy models, finding a slight preference for a varying electron mass while ruling out significant early dark energy contributions, and subsequently identifying distinct inflationary scenarios favored by each model.
This study systematically analyzes how a Hernquist dark matter halo alters the optical appearance of a Schwarzschild black hole under three accretion scenarios, revealing that the halo significantly enlarges the photon sphere and suppresses brightness, thereby offering a theoretical framework to constrain dark matter distributions in galactic centers through black hole imaging.
This paper proposes a modified thermal Renormalization Group framework, where a constant dimensionless temperature drives the cosmological constant to transition from negative (consistent with string theory at high temperatures) to positive (consistent with observations at low temperatures), thereby resolving the discrepancy between theoretical predictions and the observed accelerating expansion of the Universe.
This paper models the general relativistic interaction between a small hyperelastic sphere and a Schwarzschild black hole using an independent finite element scheme, revealing that quadrupole-order effects lead to significant orbital energy loss, spin changes, and the eventual capture of the body into a highly eccentric orbit.