3805 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 investigates how a nontrivial kinetic term in -essence-Gauss-Bonnet gravity induces kinetic screening of black-hole scalar charges in static spacetimes, while demonstrating that self-accelerating cosmological backgrounds can convert these charges from secondary to primary by leveraging the scalar field's time dependence.
This paper presents a relativistic perturbative framework to compute corrections to black hole quasibound-state spectra caused by environmental factors like galactic halos, accretion disks, and binary companions, demonstrating that previous non-relativistic estimates of superradiance termination require revision.
This paper demonstrates that while static spherical hollow cores with flat cavities and unit lapse necessarily violate energy conditions due to boundary obstructions, releasing the lapse constraint allows for the construction of regular, energy-condition-compliant hollow shells with Schwarzschild exteriors and no thin shells.
This paper presents a novel analytical framework demonstrating that while dark matter halos induce detectable gravitational-wave dephasing in extreme mass ratio inspirals, this effect is significantly suppressed by black hole spin, establishing EMRIs as a robust probe for galactic dark matter distributions using future space-borne detectors.
This paper investigates the power and efficiency of magnetic reconnection-based energy extraction from rotating black holes surrounded by cold dark matter halos, demonstrating that such extraction is feasible and analyzing the associated spacetime properties and efficiency limits.
This study demonstrates that magnetic reconnection in rotating Einstein-AdS SU(N)-nonlinear sigma model black holes enables highly efficient energy extraction with power exceeding the Blandford-Znajek mechanism, even at remarkably low spin thresholds of 0.7 in circular orbits and 0.2 in plunging regions, a phenomenon significantly enhanced by the coupling constant, AdS radius, and flavor number.
This paper retracts previous discovery claims from the DANTE unsupervised transient-noise pipeline, presenting instead a rigorous stress-test that identifies specific failure modes, validity conditions, and detector-dependent limitations under representation mismatch for LIGO O4a data.
This study extends the sign-switch CDM model to include spatial curvature and, using combined Planck 2018, DESI DR2, and PantheonPlus\&SH0ES data, finds that the universe is consistent with spatial flatness () while the model itself receives only weak observational support compared to the standard CDM framework.
This paper demonstrates that the static tidal Love numbers of four-dimensional, spherically symmetric black holes vanish for fermionic perturbations if and only if the black hole is extremal, a result derived from an exact solution to the static massless Dirac equation that distinguishes fermionic behavior from the generally non-zero bosonic case.
This paper proposes a novel, model-dependent method to estimate the effective graviton mass on a galactic scale by deriving a characteristic nonlinear density wave wavelength from a Newtonian potential corrected for nonlinear effects and identifying it with the graviton's Compton wavelength, offering an approach independent of existing gravitational wave or modified gravity constraints.