3841 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 tests a horizon-based model for direct waves in binary black hole ringdowns using numerical-relativity waveforms, confirming the model's utility for identifying these signals but finding that frequency deviations limit their effectiveness as a probe of event horizon geometry.
This paper demonstrates that static, asymptotically flat regular black holes cannot naturally evolve into indefinitely expanding, geodesically complete FRW cosmologies due to mass-curvature scaling conflicts in closed models and geodesic incompleteness in flat/open models, thereby necessitating additional structural modifications or stress-energy components for viable cosmological transitions.
This paper establishes a rigorous variational framework using covariant variations and parallel transport to derive simple Lagrangians for point-particle models, including the Mathisson-Papapetrou-Dixon equations for spinning bodies and a null-particle model for light propagation, where standard variational methods require careful handling of worldline-coupled tensor fields.
This paper constructs a discrete BF formulation of two-dimensional Carroll dilaton gravity, demonstrating that its boundary symmetries form an affine Carroll algebra with a conformal Virasoro reduction, thereby establishing the ultra-relativistic counterpart to discrete Jackiw-Teitelboim gravity.
This paper demonstrates that acoustic Schwarzschild black holes, as potential dark matter candidates, produce distinct Galactic microlensing signatures compared to standard black holes, with their tuning parameter significantly increasing the Einstein ring radius, event duration, peak magnification, and detection probability.
This paper investigates how the Modified Gravity (MOG) parameter and black hole spin influence the time-of-arrival difference of signals from a pulsar passing behind a Kerr-MOG black hole, extending the Laguna-Wolszczan formula to third post-Newtonian order to provide a potential astrophysical method for constraining deviations from General Relativity.
The paper presents DANTE, an unsupervised pipeline that leverages a pre-trained Vision Transformer and an adaptive Dirichlet Process Mixture Model to characterize and triage transient anomalies in LIGO O4a data, demonstrating that native background recalibration is essential for distinguishing genuine novel artifacts from stationary instrumental noise caused by domain shifts.
This paper establishes the future -inextendibility of a broad class of globally hyperbolic, warped-product black hole spacetimes with static exteriors and compact homogeneous fibres by adapting Sbierski's proof method from the Schwarzschild case to include nonvacuum models and geometries beyond spherical symmetry.
This paper establishes a Hamiltonian formalism for spinning test particles in curved spacetime and proves that the corresponding Hamilton-Jacobi equation is separable whenever both the underlying geodesic motion and parallel transport are separable, a result demonstrated across black hole, plane wave, and cosmological spacetimes.
This paper demonstrates that static black holes with primary hair in a subfamily of DHOST theories are radially stable by recasting the monopole mode equation into a flat wave equation within the unitary gauge, which extends beyond the event horizon and applies universally to disformally related solutions, while also revealing that stealth black holes exhibit either a lack of propagating modes or stable radial degrees of freedom depending on their kinetic term behavior.