2649 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 study employs open quantum system methods and Arnoldi iterations to analyze Krylov complexity and entropy in the early universe, revealing that while non-trivial sound speed yields similar complexity trends to the standard case, it induces distinct entropy evolution and maximally chaotic behavior characterized by specific Lanczos coefficients.
This paper simulates the optical appearance of reflection-asymmetric traversable thin-shell wormholes in Palatini gravity, revealing that light crossing the throat creates a distinct, luminous multi-photon ring structure and a significantly reduced central shadow compared to canonical black holes, offering a potential observational signature to distinguish these exotic objects.
This paper characterizes stable, off-equatorial circular orbits around magnetically charged black holes, demonstrating that such unique trajectories—impossible in electrically charged spacetimes—exhibit significant latitude deviations and stability under synchrotron radiation, offering potential observational signatures to constrain the magnetic charge of astrophysical black holes.
This paper investigates the quasinormal modes, greybody factors, and exceptional points of Schwarzschild-de Sitter black holes in semi-open systems with a partially reflective wall, utilizing Heun functions to reveal distinct mode behaviors, oscillatory greybody factors dependent on wall distance, and a second-order exceptional point characterized by mode exchange and square-root spectral deviations.
This paper establishes a unified framework for studying primordial black hole formation in dust-radiation bouncing cosmologies and demonstrates that while the curvature perturbation threshold is extremely low, the resulting abundance of primordial black holes is vanishingly small due to the significant suppression caused by radiation pressure and two-fluid collapse conditions.
This paper investigates a generalized Dymnikova black hole surrounded by perfect fluid dark matter and a cloud of strings, analyzing how these matter sources modify its thermodynamic stability, photon and particle dynamics, and quasi-periodic oscillation signatures.
This paper demonstrates that while a classical Newtonian potential can induce recoherence in systems lacking internal structure, the interplay between gravitons and a composite particle's internal degrees of freedom ultimately ensures inevitable long-time gravitational decoherence even for microscopic masses.
This paper establishes a unified semiclassical framework for the Reissner--Nordström black hole using Misner--Sharp--Hernandez mass quantization, which yields discrete mass spectra and Planck-scale corrections to thermodynamics that are encoded into a quantum-deformed geometry exhibiting modified surface gravities, stabilized inner horizons, and subtle shifts in observational signatures.
This paper proposes that a source mass in a quantum superposition of spatial states can induce a repulsive gravitational effect on a probe mass under specific postselection conditions, thereby demonstrating the quantum superposition of gravitational forces and spacetime through the mechanism of anomalous negative weak values.
State-of-the-art GRMHD simulations demonstrate that black holes can sustain a quasi-steady magnetically arrested disk state where accretion is globally suppressed, enabling jet power to exceed the accretion energy input by over two orders of magnitude through highly efficient spin extraction via the Blandford-Znajek mechanism.