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.
By applying the Schwarz-Pick theorem to the holomorphic self-map properties of the retarded Green's function, this paper establishes a universal bound on the frequency-dependent dynamical Love number for compact objects like neutron stars and black holes, which is saturated by the single-mode model for neutron stars and constrains tidal heating for black holes.
This paper utilizes the Schwarzian derivative to formulate and solve differential equations that systematically generate, purify, and relate various two-dimensional spacetime subsets exhibiting thermal particle distributions within the framework of quantum field theory in curved spacetime.
This paper analytically demonstrates that a flattened disk-like mass distribution at the Galactic Center induces unique secular orbital shifts and precessions in stars like S2 and S301, which can be distinguished from spherical mass effects and used to constrain the disk's properties and the black hole's spin.
This paper details the commissioning challenges and upgrades of Advanced Virgo, including the installation of a signal recycling mirror, during the fourth observing run from April 2024 to November 2025, highlighting its 68.9% duty cycle and a median binary neutron star range of 53 Mpc.
This paper establishes that while a smooth, semi-global matching between an expanding McVittie spacetime and a flat FLRW spacetime is mathematically possible via a unique solution to a specific ODE system, the resulting matching hypersurface generically contains spacelike regions, thereby proving that a global isotropic source for the McVittie cosmological black hole does not exist.
This paper provides both an analytic proof and numerical evidence demonstrating that tidally induced quadrupole moments in compact bodies generically destroy the integrability of Kerr black hole geodesics by preventing the existence of a conserved Carter constant, thereby introducing chaotic dynamics into the system.
This paper develops a robust worldline effective field theory framework to model perturbations in gravitational atoms, revealing that spinning bosonic clouds can exhibit parametrically enhanced negative Love numbers and significantly altering binary inspiral dynamics through shifted resonances and competing tidal effects.
This paper demonstrates that introducing non-minimal coupling to gravity in chain inflation models resolves the tension preventing high-energy scale inflation, thereby enabling viable scenarios at that predict distinct, testable signatures in the stochastic gravitational wave background and spectral index running.
This study investigates how hyperons and quark-hadron phase transitions affect neutron star structures within regularized four-dimensional Einstein-Gauss-Bonnet gravity, concluding that while positive Gauss-Bonnet coupling constants allow for massive stars consistent with observational constraints, negative values fail to support the required maximum masses, thereby enabling astrophysical data to effectively constrain the theory's parameters.
This paper establishes a symmetry-based framework for Dirac fermions on two-dimensional hyperbolic lattices by incorporating spin-curvature coupling via a discrete spin connection, demonstrating through both continuum theory and numerical simulations that this interaction leads to a robust, nonvanishing low-energy density of states which enhances susceptibility to interaction-driven instabilities.