2649 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 reviews the twistor theory construction of stationary, axisymmetric vacuum solutions to the Einstein equations via holomorphic patching matrices on reduced twistor space, provides a catalogue of examples, and investigates the extent to which a metric's rod structure and asymptotics determine its corresponding patching matrix.
This paper presents a general Bayesian algorithm for inferring the gravitational constant from wide binary orbits using 3D modeling and applies it in a pilot study of 32 Gaia systems with HARPS radial velocities, finding tentative evidence for a deviation from Newtonian gravity that is heavily influenced by a single outlier system and requires further verification.
This paper outlines the complex analysis methods employed by the LIGO-Virgo-KAGRA Collaboration to identify, characterize, and produce the fourth release of the Gravitational-Wave Transient Catalog (GWTC-4.0), specifically focusing on data from the first part of their fourth observing run.
This paper demonstrates that gravitational instantons, specifically Eguchi-Hanson geometries, induce quantized fluxes that enforce global boundary conditions on fermion wavefunctions and, upon summation over flux sectors in the path integral, gauge the Standard Model's 1-form symmetry, thereby proving it cannot persist as an exact global symmetry while simultaneously inducing exponentially suppressed baryon- and lepton-number violating processes.
This study employs Bayesian inference with hadronic and quark matter models to demonstrate that while the presence of large quark cores in 1.4 solar mass neutron stars depends on the specific quark model used, both frameworks predict quark matter in 2 solar mass stars, with the mass-radius curve slope serving as a key indicator of non-nucleonic matter.
This paper investigates how a fundamental zero-point length () from quantum gravity modifies Friedmann equations and generates baryon asymmetry during the radiation epoch, ultimately constraining to be less than approximately meters (about 440 times the Planck length) while demonstrating that such corrections slow the early Universe's expansion and maintain higher temperatures for longer durations.
This paper reviews the recent debate regarding the absence of a spin Hall effect in uniform gravitational fields, highlighting key distinctions from the anomalous spin Hall effect observed in ferromagnets despite their Hamiltonians sharing a similar mathematical form.
This paper, which purported to discuss regular magnetically charged black holes from nonlinear electrodynamics, was withdrawn from arXiv due to disputed and unverifiable authorship and affiliation.
This paper investigates late-time cosmic acceleration in a spatially flat FLRW universe within gravity by modeling matter as a bulk viscous fluid with a free equation-of-state parameter, demonstrating through observational constraints and diagnostic tools that this scenario provides a viable alternative to the standard CDM model.
This paper proposes a novel solution to the cosmological constant problem within pre-geometric gravity, where spacetime emergence and symmetry breaking dynamically link the Gauss-Bonnet coupling to de Sitter entropy, quantizing the cosmological constant into discrete topological sectors and naturally selecting the observed vacuum state through a stabilizing potential barrier.