3151 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 explores a cosmological model incorporating Rényi entropic corrections to the Friedmann equations, demonstrating that it provides a robust, stable, and observationally consistent alternative to CDM by successfully explaining late-time cosmic acceleration while satisfying constraints from DESI, BAO, and gravitational-wave data.
This paper provides a comprehensive review and a strategic research roadmap for using machine learning to integrate heterogeneous multi-messenger datasets—including gravitational waves, cosmic rays, neutrinos, and collider data—to probe dark matter properties and physics beyond the Standard Model.
This paper generalizes McCann's seminal work by characterizing timelike Ricci curvature lower bounds in globally hyperbolic spacetimes through the convexity of relative entropy along geodesics derived from a new class of Orlicz-type Lorentzian optimal transport problems.
This paper proposes a method using the Herglotz variational principle to formulate a class of gravity theories that restores the covariant conservation of the energy-momentum tensor, which is typically violated in non-minimally coupled modified gravity models.
This paper investigates how the competing effects of a nonlinear-electrodynamics magnetic charge and a Hernquist dark-matter halo influence the quasinormal modes, shadow observables, gravitational lensing, and neutrino-pair annihilation rates of a static, spherically symmetric black hole.
This paper demonstrates that the apparent instability of cosmological perturbations in quadratic gravity is a gauge-dependent artifact rather than a physical pathology by employing a gauge-independent approach in the Einstein frame.
This paper demonstrates that multi-band gravitational wave observations from the Square Kilometre Array and the Einstein Telescope, utilizing primordial black holes as sources, can provide a novel, distance-ladder-independent method to constrain the Hubble parameter () with high precision.
This paper develops exact radiation boundary conditions and near-to-far field transformation kernels for the Bardeen-Press equation to eliminate unphysical reflections and enable accurate, long-duration gravitational-wave simulations on finite computational domains.
This paper uses an algebraic approach to study free Carrollian quantum field theories, demonstrating that while massive theories allow for regular vacuum and thermal states, massless theories exhibit more complex behaviors that necessitate a Hilbert space representation consisting of both a standard Fock sector and a nonseparable zero-mode sector, providing new insights into the role of infrared degrees of freedom in flat space holography.
This paper rigorously establishes that dynamical quantum non-locality originates from the superposition principle by proving that the Wigner propagator reduces to its classical counterpart if and only if the Hamiltonian is at most quadratic, and introduces a measurable signed divergence that unifies the understanding of five distinct quantum phenomena ranging from non-local games to metrological gains.