2693 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 analyzes density perturbations in nonminimally coupled gravity to demonstrate that the ambiguity in choosing the matter Lagrangian ( versus ) leads to unphysical singularities in the former, which are resolved by the latter, thereby constraining viable modifications to the action.
This paper demonstrates that "scrambling" methods for calculating p-values in Pulsar Timing Array analyses are not truly model-independent, and advocates for rigorous Bayesian and Frequentist approaches based on the generalized distribution, concluding that no correct Frequentist p-values have been calculated in the PTA literature to date.
This paper demonstrates that within an axisymmetric Bianchi IX cosmological model, spacetime anisotropy and global rotation induce spin-dependent energy splittings and particle-antiparticle asymmetries in Dirac spinor fields, suggesting that geometric effects alone could contribute to the universe's matter-antimatter asymmetry.
This paper argues that primordial black hole models based on inflection point potentials are prone to eternal inflation, which generates inhomogeneous baby universes that dominate the multiverse's volume and render these models incompatible with large-scale structure observations under volume weighting.
This review article utilizes modern quantum optics to explore the interplay between interacting atoms, fields, and spacetime, demonstrating how horizon-brightened radiation (HBAR) serves as a key case study linking quantum information, thermalization, and black hole thermodynamics.
This paper introduces a novel framework demonstrating that dynamical matter fields outside a black hole horizon significantly alter ringdown gravitational waveforms through phenomena such as echo suppression or enhancement, frequency shifts, and power-law tail modulations, thereby offering new observational signatures for probing dynamic black hole environments.
This paper derives the effective dynamics of a dust thin shell within a loop quantum gravity-inspired framework to provide a physically meaningful extension of spacetime beyond shell-crossing singularities, demonstrating that the shell undergoes a quantum bounce and subsequently expands into a white-hole vacuum region.
This paper extends the analysis of parameter-estimation biases in overlapping gravitational-wave signals from single detectors to a network, introducing a "bias integral" to characterize how extrinsic parameters influence these biases and revealing that while network configurations can sometimes suppress errors, they often exacerbate them for nearly half of overlapping events.
This paper presents numerical relativity simulations of dynamical captures between equal-mass nonspinning black holes across various initial momenta and incidence angles to analyze gravitational wave emissions, characterize merger dynamics, and develop analytical models that distinguish between scattering and capture events.
This study proposes an improved distribution function for the dispersion measure of extragalactic gas in fast radio bursts to derive the most stringent constraints on photon rest mass to date, finding upper limits around kg across various cosmological models and thereby providing robust empirical support for the massless nature of photons.