2575 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 demonstrates that tensor perturbations generated during first-order cosmological phase transitions in a secluded dark sector can produce observable CMB B-mode signals comparable to inflationary predictions, potentially complicating the interpretation of future data but offering a way to distinguish the two scenarios through multi-scale measurements.
This paper proposes the Modular Channels Flow Correspondence (MCFC), a unified framework that derives Einstein's equations and explains the Unruh effect and black hole evaporation as consequences of a universal thermal filtering mechanism governing the spectral dynamics of modular quantum channels.
This paper proposes a novel quantity derived from gravitational wave amplitude and frequency derivatives to extract dark matter density profiles around black holes, enabling multi-wavelength observations to probe dark sector properties and constrain primordial black hole origins.
This paper investigates the local characteristics of the Fulling-Rindler vacuum for a massive Dirac field in -dimensional spacetime with a uniformly accelerating mirror, decomposing the fermion condensate and energy-momentum tensor into boundary-free and boundary-induced contributions to reveal their distinct behaviors near the Rindler horizon and the mirror, as well as their contrasting properties compared to the Minkowski vacuum.
This paper constructs self-gravitating, singularity-free baryonic tube solitons in an $SU(N)$ Einstein non-linear sigma model coupled to -mesons, demonstrating that increasing the number of flavors enhances physical predictions by reducing binding energy despite increasing total energy.
This paper argues that the Kerr-Schild and twistorial double copy prescriptions are equivalent for a broad class of self-dual vacuum solutions, a claim demonstrated through elementary null Lorentz transformations and illustrated with the self-dual Kerr-Taub-NUT spacetime.
This paper constructs the metric-affine analogue of quadratic degenerate higher-order scalar-tensor (DHOST) theories, demonstrating that imposing standard degeneracy conditions and the gravitational wave speed constraint restricts the theory to a specific Palatini Class Ia branch characterized by a single free function.
This study utilizes ray-tracing simulations with a fisheye camera model to analyze the visual characteristics and shadow properties of rotating black holes in 4D Einstein-Gauss-Bonnet gravity under thin accretion disk and celestial light sphere illumination, ultimately constraining the theory's coupling parameter using observational data from M87* and Sgr A*.
This paper demonstrates that a Weyl-flat null origin of inflation is compatible with current observations by establishing it as an asymptotic universality class for single-field models, which yields a viable phenomenological framework with realistic spectral indices and tensor-to-scalar ratios.
This paper proposes a quantum-deformed phase-space geometry framework that, through a section-pullback reduction to effective four-dimensional spacetime, yields modified gravitational and cosmological equations capable of describing inflationary dynamics and linking quantum gravity effects to observable inflationary corrections.