3202 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 presents numerically-informed closed-form expressions for the dominant post-merger gravitational waveforms of non-spinning, highly eccentric binary black hole mergers with comparable masses, achieving high accuracy through Bayesian-derived models based on 233 RIT simulations and validated against SXS data.
This paper introduces and validates two new N-body simulation codes, PySCo-EFT and ECOSMOG-EFT, designed to accurately model non-linear structure formation and Vainshtein screening in Effective Field Theory of Dark Energy cosmologies, providing essential tools for constraining modified gravity theories with upcoming large-scale structure surveys.
This paper presents the Hamiltonian formulation of a gravity model derived from (A)dS Yang-Mills theory, demonstrating that in the Poincaré contraction limit with a specific gauge condition, the theory possesses only two propagating physical degrees of freedom.
This paper introduces a specific ansatz for force-free electrodynamics in Minkowski spacetime that reduces the nonlinear system to a semilinear scalar wave equation, enabling the derivation of explicit time-dependent solutions, including finite-energy type-changing configurations and null kinks, while characterizing minimal field-sheet foliations for traveling waves in the magnetically dominated regime.
This paper utilizes a semi-analytic RIAF model to demonstrate that Sgr A*'s persistent negative circular polarization at 230 GHz is primarily driven by Faraday conversion in most magnetic field geometries, allowing the exclusion of reversed-field models at high inclinations and thereby constraining the black hole's magnetic field configuration.
This paper employs the Dirac-Bergmann algorithm to demonstrate that introducing fixed external currents into Seiberg-Witten mapped non-commutative electrodynamics creates a source-compatibility obstruction located within the Dirac constraint chain, which typically resolves by fixing the primary multiplier rather than generating new constraints, thereby limiting a complete reduced-phase-space analysis to specific first-class subcases.
This paper presents a simple general relativity model coupled to a constrained scalar triplet and a non-propagating three-form sector that yields a continuous family of asymptotically flat, geometrically regular black holes with topological hedgehog scalar hair, a de Sitter core, and Schwarzschild-like asymptotic behavior corrected only at order .
This paper proposes a new vertical mechanical differential gradiometer utilizing a counterweight and long-wire suspension to amplify low-frequency gravitational wave signals (0.05–1 Hz) by a factor of , thereby addressing a detection gap between space-based and ground-based observatories.
This paper computes the efficiency of reversible Stirling engines across diverse working substances, identifying that regeneration can drive the efficiency toward the Carnot limit when the fixed-volume heat capacity is volume-independent, while demonstrating that for holographic CFTs dual to AdS black holes, the efficiency asymptotically approaches the Carnot value in the large-potential limit.
Using the latest LIGO-Virgo-KAGRA data, this paper demonstrates that hierarchical population-informed parameter estimation is essential for interpreting gravitational-wave observations, as standard methods relying on unphysical reference priors yield generically biased source properties unsuitable for direct astrophysical analysis.