3841 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 introduces a second-order diagnostic based on the curvature of dark energy density trajectories that explicitly isolates the evolution of the equation of state () from interaction effects, offering a robust method to distinguish dynamical dark energy from a cosmological constant even in interacting models.
This paper introduces GWJulia, a fast and accurate open-source Julia code for Fisher Information Matrix analysis of compact binary coalescences, which is used to evaluate different Einstein Telescope configurations and guide posterior sampling for gravitational wave parameter estimation.
This paper introduces a flexible Gaussian-process model to quantify numerical uncertainties in state-of-the-art numerical relativity waveforms, enabling efficient Bayesian inference of quasinormal modes without relying on expensive Markov chain Monte Carlo methods.
This paper introduces a fully Bayesian, data-driven framework to analyze high-accuracy Cauchy-Characteristic Evolution waveforms, successfully identifying a comprehensive set of quasinormal modes—including overtones, retrograde, and nonlinear modes—while confirming the physical significance of high-order overtones near merger and the absence of late-time power-law tails.
This paper proposes a bimodular gravity framework where matter couples to a disformally related metric under volume constraints, resulting in a non-propagating scalar field that drives cosmic expansion with a time-varying vacuum energy and enables a frame-dependent phantom crossing, thereby revealing a classical inequivalence between unimodular formalisms that are otherwise identical in single-metric theories.
This paper demonstrates that while spinning wormholes perfectly mimic Kerr black holes regarding the orbital properties of circular equatorial orbits, they produce a visibly suppressed accretion disk temperature due to the geometrically distinct area of the disk caused by the wormhole's throat.
This paper investigates neutron-star–wormhole systems supported by scalar fields with chaotic magnetic fields and anisotropic matter, demonstrating that such configurations can achieve extreme masses and surface redshifts while exhibiting gravitational-wave echo times that decrease with increasing magnetic field strength.
This paper demonstrates that while regular rotating extremal black holes with axionic hair exist only for purely electric or magnetic charges within the near-horizon geometry, asymptotically flat rotating extremal solutions interpolating to these electric configurations can be constructed globally, confirming the attractor mechanism's role in fixing horizon data independent of asymptotic moduli.
Through numerical simulations of charged scalar field evolution in super-extremal Reissner-Nordström spacetimes, this study demonstrates that dynamical extremal black holes act as universal threshold solutions characterized by divergent energy density and unbounded scalar curvature growth just inside the horizon, implying that near-threshold collapse scenarios without black holes can produce large curvatures visible from future null infinity.
This paper investigates cosmological gravitational particle production of dark matter in two-field inflation models, demonstrating that negative field-space curvature can significantly enhance the production of minimally coupled spectator scalars while identifying conformally coupled scenarios as a minimally constrained mechanism for purely gravitational dark matter.