3256 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 charged NUT black holes possess observable "hair" in the form of complex short-range electromagnetic fields generated by singular, nonuniform flows along Misner-Dirac strings, which simulate effective charge densities, while also noting that rotation can similarly act as a hair generator even without a NUT parameter.
This paper evaluates propulsion trade-offs for a 2035–2040 Solar Gravitational Lens mission, concluding that while solar sailing and nuclear electric propulsion face significant technological hurdles for sub-20-year travel to 650 AU, hybrid architectures combining high-speed Oberth injections with fission-powered electric propulsion offer a plausible path forward if specific system-level demonstrations are achieved by the early 2030s.
This paper reviews the status of late-time cosmic acceleration following DESI Data Release 2, analyzing the interplay between various cosmological probes to assess tensions with CDM, providing new diagnostics to mitigate systematic biases, and mapping observational constraints to physical dark energy and modified gravity models.
This paper investigates the quantum and classical signatures of a Schwarzschild black hole embedded in a Hernquist dark matter halo by deriving modified Hawking radiation and evaporation rates, analyzing absorption and scattering cross-sections, and characterizing geodesic motion to demonstrate how dark matter parameters suppress particle creation and alter observable phenomena.
This comment corrects errors in a previous study by Sahan et al. regarding Dirac particles in a magnetized rotating curved background, deriving the complete energy spectra that correctly depend on both radial and angular quantum numbers rather than just one.
This study investigates the physical properties and stability of charged compact stars in gravity by combining a Bardeen black hole exterior with a Finch-Skea interior metric, ultimately concluding that the proposed solutions are theoretically consistent and physically viable.
This paper explores flat FLRW metric-affine cosmology with symmetric matter and hypermomentum, proposing that a dark dust fluid carrying spin hypermomentum exhibits a dynamical effective equation of state that could potentially explain recent DESI DR2 observations.
This paper proposes a sign-locked gravitational baryogenesis mechanism where positive bulk viscosity in a radiation-dominated early universe generates a monotonic curvature source, successfully reproducing the observed baryon asymmetry without the cancellation effects typical of oscillating sources, while remaining consistent with current cosmological bounds and EFT control.
This paper demonstrates that topologically non-trivial vacuum bubbles in a three-form gauge sector, when endowed with quantized monopole flux, collapse into stable, finite-energy particle-like remnants called "topolons," which serve as viable dark matter candidates distinct from runaway vacuum decay channels.
This study presents the first fully relativistic GRMHD simulations of tilted, self-gravitating black hole-disk systems, revealing that misalignment between the black hole spin and disk angular momentum drives nonaxisymmetric instabilities and distinct gravitational wave signatures while enabling magnetically driven jets, thereby establishing these systems as viable multimessenger sources.