3213 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 scalar perturbations on Kaigorodov pp-wave spacetimes exhibit zero-temperature dissipation through a discrete, gapped quasinormal mode spectrum, establishing that horizonless geometries can act as geometric absorbers without requiring an event horizon or entropy.
This paper demonstrates that multi-field axion-like early dark energy models, particularly those with two fields, significantly alleviate the strong constraints from Planck CMB data and reduce the Hubble tension to a residual, outperforming single-field scenarios by better fitting high- CMB data and modifying the pre-recombination history.
This paper employs a genetic algorithm to reconstruct single-field inflationary scenarios with localized features in the primordial power spectrum that significantly improve the fit to Planck 2018 CMB data and offer potential pathways to alleviate cosmological tensions.
This paper demonstrates that in exotic compact object spacetimes like dyonic black holes, multiple coexisting branches of bound orbits can share identical topological indices yet produce radiatively distinct gravitational wave signatures, offering a novel observational probe for physics beyond general relativity.
This study demonstrates that even at its current modest sensitivity, KAGRA significantly enhances the sky localization of compact binary coalescences within the global detector network by providing geometric complementarity and breaking degeneracies, with performance improving substantially as its sensitivity increases to support effective electromagnetic follow-up.
This paper establishes a unified analytic framework for four-dimensional regular black holes in quasi-topological gravity by deriving closed-form quasinormal mode formulas and explicitly linking ringdown frequencies, shadow scales, and strong-lensing observables through shared geodesic invariants.
This paper investigates spontaneous scalarization in magnetized Reissner-Nordström black holes induced by parity-violating and parity-preserving interactions, revealing that external magnetic fields lower the scalarization threshold for Chern-Simons couplings while producing a pronounced asymmetry in the Gauss-Bonnet channels and modifying late-time dynamics into bounded oscillatory evolution.
This paper demonstrates that integrating out a heavy Dirac fermion with an inflaton-dependent mass induces one-loop corrections that transiently amplify gauge-field production during axion inflation, thereby generating a chiral stochastic gravitational-wave background in the deci-hertz band detectable by future observatories like BBO and DECIGO while satisfying primordial black hole constraints.
This paper introduces a covariant orthogonality diagnostic to validate approximate analytical models of electromagnetic radiation reaction in Schwarzschild spacetime, demonstrating that combining the conservative Smith-Will and dissipative Gal'tsov tail terms significantly suppresses violations of four-velocity normalization compared to using the conservative term alone.
This paper introduces VIGILant, an automatic pipeline deployed at the Virgo detector that utilizes a high-performing ResNet34 model to classify and visualize gravitational-wave glitches, enabling real-time monitoring and improved data quality analysis.