3826 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 by applying an action-based procedure to remove spurious higher-derivative degrees of freedom from general relativity supplemented with cubic Riemann terms, the resulting effective theory of gravity can be reformulated as a minimally modified gravity model that propagates only the massless spin-2 graviton while exhibiting a preferred frame at short distances.
Using a sample of 124 localized Fast Radio Bursts, this study constrains the baryon fraction in extragalactic diffuse ionized gas to be over 90%, providing strong evidence that the majority of the universe's missing baryons reside in this phase of the intergalactic medium.
This paper proposes a method for constructing complex bulk metrics from families of complex extremal surfaces associated with timelike entanglement, utilizing the Kontsevich–Segal–Witten criterion to uniquely determine admissible integration contours and organize complex saddles in real-time holography.
This paper introduces IfoScout, a novel two-stage machine learning framework that combines reinforcement learning for optimizing interferometer placement and orientation with differential programming for tuning internal parameters, aiming to co-design cost-effective, high-sensitivity ground-based gravitational wave detector networks.
This paper systematically evaluates how specific instrumental design choices and noise degradations across different frequency bands impact the Einstein Telescope's scientific capabilities, concluding that while sensitivity variations significantly affect distinct objectives like early warning or post-merger studies, the observatory's overall scientific case remains robust.
This paper establishes that within the linearized quantum gravity regime of AdS/CFT, the holographic map preserves relative entropy (satisfying the JLMS condition) and, through a modular crossed product construction, rigorously demonstrates that the state-dependent entropy of dual CFT states satisfies the vacuum-subtracted Hubeney-Rangamani-Takayanagi formula for localized semi-classical excitations.
This paper investigates inflation within unimodular loop quantum cosmology by utilizing a geometrically meaningful unimodular time coordinate independent of matter content to derive analytical and numerical solutions for various potentials, demonstrating that -attractor models can produce observationally consistent bounces with potential quantum-gravity imprints.
This paper establishes a geometric theory of information processing in the Horizon-brightened acceleration radiation (HBAR) channel, demonstrating that the radiative change in black-hole horizon area serves as a fundamental entropy budget that bounds accessible classical information, mutual information, and Fisher-information-based speed limits for atoms falling into black holes.
This paper proposes that the anomalous high spin-down rate of the millisecond pulsar PSR J0435+3233 is caused by gravitational acceleration from a distant tertiary companion, identifying the system as a hierarchical triple consisting of the pulsar binary and an F-type main-sequence star in a wide, eccentric orbit, which resolves the spin-down anomaly and opens new avenues for testing fundamental physics.
This paper establishes a sharp volume-stability theorem for closed hyperbolic three-manifolds, proving that metrics with scalar curvature bounded below by $-6$ and volumes converging to the hyperbolic volume must -converge to the hyperbolic metric outside sets of vanishing volume, thereby demonstrating the stability of the Fischer--Moncrief reduced Hamiltonian at the Lorentz-cone ground state.