3967 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 proposes group entropies as a unifying framework that defines universality classes of extensive entropies for strongly correlated systems, successfully deriving consistent thermodynamic laws and demonstrating that black holes naturally exhibit negative specific heat within this formalism.
This paper investigates the limit of Gauss-Bonnet gravity coupled with quintessence, deriving exact black hole solutions that exhibit unique horizon behaviors, stable phantom-like photon orbits, and thermodynamic stability leading to stable remnants, thereby highlighting the profound influence of quintessential matter on lower-dimensional gravitational physics.
The paper proves that for spherically symmetric hairy black holes satisfying the weak energy condition, the ratio of the shadow radius to the horizon radius is bounded from below by , a limit that is saturated by the Schwarzschild black hole.
This paper investigates cosmology in gravity by demonstrating that a thick brane's embedding in a five-dimensional bulk naturally generates an effective cosmological constant and accelerated expansion without a fundamental brane constant, offering a geometric explanation for cosmic acceleration and the smallness of the observed cosmological constant.
This paper proposes utilizing the line-of-sight shear of strong gravitational lenses detected in Stage-IV surveys as a new cosmological probe, demonstrating through analytical derivations and covariance analysis that this approach significantly enhances the standard pt correlation method to a pt scheme with high signal-to-noise ratio and potential for mitigating systematic errors.
This paper presents the first observational constraints on Luciano-Saridakis entropic cosmology using combined background data, demonstrating that the model provides a statistically robust fit to current observations and offers a viable extension to the standard CDM model with the potential to alleviate the Hubble tension.
This paper establishes a correspondence between the Extended Uncertainty Principle (EUP) and the Schwarzschild black hole metric to demonstrate that while the event horizon remains unchanged, increasing EUP parameters expand the photon sphere but shrink the shadow size, thereby allowing observational data from Sgr A* to constrain EUP parameters.
This paper constructs locally inertial and radially locked reference frames for geodesic observers in stationary axisymmetric dust spacetimes to analyze dust configurations via photon frequency shifts and establish a general relativistic framework for reconstructing spectroscopic and astrometric relative velocities in galactic kinematics.
This paper establishes a systematic framework for identifying separability structures in stationary, axisymmetric spacetimes with matter fields, using a generalized metric ansatz to derive new rotating black hole and wormhole solutions.
This paper argues that we cannot empirically determine whether the universe had a beginning, demonstrating that common defenses of a cosmic origin rely on confirmation theory errors and that, due to extensions of the Malament-Manchak theorems, observers in almost all classical spacetimes cannot distinguish between models with a past singularity and those that are beginningless or lack the requisite time ordering.