3767 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 proposes an optimized space-based experimental framework for measuring Newton's gravitational constant that combines a disturbance-free environment with lock-in techniques, null coordinates, and the method of covariances to analyze data from two distinct measurement channels.
This paper investigates axial gravitational perturbations and shadow formation in symmetric and asymmetric black-bounce geometries supported by anisotropic fluids, revealing that while horizon-containing solutions closely mimic standard black holes, horizonless symmetric configurations exhibit distinct features like gravitational-wave echoes and multiple photon rings, whereas horizonless asymmetric solutions remain phenomenologically similar to the Reissner-Nordström case.
This paper investigates quantum chaos near a wormhole throat by quantizing the transverse fluctuations of a circular probe string and demonstrating that the resulting out-of-time-ordered correlators exhibit finite-time exponential growth, thereby establishing a non-holographic framework for diagnosing dynamical sensitivity in curved spacetimes.
This paper presents an explicit three-parameter family of complete, toric Einstein-Maxwell gravitational instantons derived from an analytic continuation of Ovcharenko-Podolsky's Lorentzian black hole geometries, featuring two asymptotic ends diffeomorphic to and a non-collapsing two-cycle in the bulk.
This paper analytically characterizes the motion of spinning test particles in Schwarzschild-(anti-)de Sitter spacetime by reducing their dynamics to a spin-deformed quintic polynomial, enabling a complete classification of orbital types and demonstrating that spin can sustain bound orbits even in cosmological regimes where spinless particles cannot.
This paper extends thermodynamic analyses to the general Kerr-Newman-Bertotti-Robinson black hole family by using covariant surface charges and canonical integrability methods to derive the Christodoulou-Ruffini mass and associated potentials, thereby confirming that the first law and Smarr formula retain their standard Kerr-Newman form while recovering previous special cases as limits.
This paper formulates a direct clock-noise propagation and calibration framework for master–slave phase-locking configurations in space-based gravitational-wave detectors, demonstrating that this approach reduces clock-noise residuals in second-generation time-delay interferometry combinations before final calibration compared to existing methods based on independent one-way measurements.
The paper argues that the black hole information paradox cannot be grounded in failures of global hyperbolicity or predictability, as deidealized black hole evaporation models can remain both prediction and retrodiction friendly.
This paper demonstrates that applying Minimal Geometric Deformation to a Schwarzschild black hole seed yields two mutually exclusive global spacetime branches—a black hole or a two-ended wormhole—depending on whether the coupling strength keeps the deformation-induced root inside or outside the original horizon, with the transition between these non-diffeomorphic manifolds dictated by the preservation of Lorentzian signature and distinguished by their second homology groups.
This paper demonstrates that a scalar field model with a positive non-minimal coupling to gravity () can successfully realize a safe crossing of the phantom divide while satisfying local and Big Bang Nucleosynthesis constraints, and a full Monte Carlo analysis incorporating the latest supernova data reveals a moderate preference for this model over the standard CDM paradigm.