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 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 presents a class of -dimensional Einstein-scalar gravity solutions in generalized Weyl form, detailing methods to generate multipolar scalar fields and magnetic fields via $SO(2)$ and Harrison-type transformations, which yield new solutions encompassing the scalar Schwarzschild--Melvin and Fisher--Janis--Newman--Winicour limits.
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 presents a fully analytic derivation of the LISA response to the kinematic dipole in the stochastic gravitational-wave background, constructs an optimal estimator for its detection, and provides Fisher forecasts indicating that measuring our peculiar velocity is feasible for sufficiently strong backgrounds, particularly with improved instrumental sensitivity or richer frequency profiles.
This paper introduces the relative magnification factor to characterize point sources on accretion disks, demonstrating that corotating source motion significantly distorts magnification patterns and caustic structures compared to static sources, thereby offering a novel probe for studying the interplay between spacetime geometry and accretion flow kinematics.
This paper proposes a covariant, gauge-independent framework for constructing foliation-based scalar-tensor theories with operators up to four derivatives that extend beyond DHOST and U-DHOST models, ultimately demonstrating that the theory propagates three physical degrees of freedom.
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.
This paper presents the first calculation of gravitational-wave memory from binary black hole mergers in scalar-Gauss-Bonnet gravity, revealing that while direct scalar contributions are suppressed, indirect modifications to merger dynamics alter memory amplitudes by a few percent and significantly enhance the detectability of deviations from general relativity when memory is included in third-generation detector analyses.
This paper investigates a model of 3d gravity relevant to open CFT sectors by demonstrating that open Virasoro TQFT computes gravitational path integrals with specific boundary conditions and naturally derives the relationship between Conformal Turaev-Viro theory and diagonal Virasoro TQFT through open-closed duality.