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 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 constructs four-dimensional de Sitter space as an excited Glauber-Sudarshan state within M-theory and its dual heterotic string theories to evade vacuum-based no-go theorems, deriving the necessary effective field theory conditions equivalent to the null energy condition and analyzing constraints from axionic cosmology.
This paper proposes that in curved spacetime, probability acquires a fundamentally quasilocal character where gravitational boundaries and horizons convert global conservation into a flux balance law, inducing effective non-Hermiticity for restricted observers while preserving global unitarity and yielding observable imprints in black hole ringdowns.
This paper proposes a new mechanism to solve the cosmological constant problem by utilizing a global constraint derived from a lapse function in a 5-dimensional anisotropic gravitational theory, which successfully cancels radiative contributions to vacuum energy at all orders while preserving 4D Lorentz invariance.
This paper proposes a fluid-based analogue gravity setup using surface-gravity waves to experimentally emulate the instabilities of regular black holes and horizonless mimickers, concluding that while theoretically feasible, alternative media like Bose-Einstein condensates may be more practical for capturing these specific physical features.
This paper demonstrates that while unrestricted generalized Vaidya exteriors in metric gravity leave the Oppenheimer-Snyder collapse problem formally open, imposing physically realistic matter constraints forces the exterior solution into highly restricted branches that either lack global asymptotic validity or reduce the interior to a constant-curvature sector, thereby failing to resolve the collapse of dust.
This paper refutes claims that quantum damping of cosmological shear in modified loop quantum cosmology is non-generic by demonstrating that previous counterexamples relied on unphysical initial conditions, and establishes that for physically admissible three-dimensional contracting universes, shear damping is a robust feature leading to an isotropic attractor and classicalization.
This paper demonstrates that applying a Generalized Uncertainty Principle with both minimal length and maximal momentum to Schwarzschild black holes results in a finite, discrete mass spectrum with a strict upper bound and regulated thermodynamics, thereby using observations of supermassive black holes to constrain the GUP parameter to .
This paper develops a simplified relativistic kinetic theory for gases with internal degrees of freedom using a BGK-type collision term to derive first-order thermal coefficients via the Chapman-Enskog expansion and construct a self-consistent Einstein-Boltzmann system for spatially homogeneous models with viscosity and heat flow.
This paper investigates the solar production of symmetrons via photon conversion in the tachocline and their subsequent absorption in underground liquid xenon detectors, establishing new astrophysical bounds based on solar luminosity limits and deriving complementary direct-detection constraints using XENONnT data to probe previously uncharted regions of symmetron parameter space.