2532 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 scalar, vector, and tensor cosmological perturbations in a gravity theory with non-minimal derivative coupling, demonstrating that all modes are amplified during the early quasi-de Sitter inflationary stage—a behavior distinct from standard Friedmann cosmology—while the coupling naturally vanishes at late times to restore standard evolution.
This paper demonstrates that both zero-latency filtering and a novel "inpainting" technique can successfully identify massive black hole binary mergers in realistic LISA datasets, even in the presence of data gaps and overlapping signals, thereby enabling critical pre-merger sky localization for multi-messenger observations.
This paper argues that Euclidean wormholes offer a physically rich and holographically consistent alternative to the Hartle-Hawking no-boundary proposal for defining the Universe's initial quantum state, successfully expanding the semiclassical landscape of initial conditions while resolving key issues plaguing earlier models.
This paper extends the optical metric method for gravitational lensing to a static optical constant-curvature (SOCC) background, demonstrating that the exact lens equation retains a unified trigonometric form and successfully resolves the divergence of the light deflection angle in the zero-mass limit of Weyl gravity's Mannheim-Kazanas solution by properly incorporating long-distance curvature effects.
This paper presents a comprehensive test of General Relativity using the gravitational wave signal GW230529_181500 from a neutron star merging with a lower mass-gap compact object, confirming the theory's validity while establishing the most stringent constraints to date on dipole radiation and the Gauss-Bonnet coupling in Einstein-scalar-Gauss-Bonnet gravity.
This paper demonstrates that incorporating a time-dependent torsion scalar into a non-interacting holographic dark energy model with the Hubble radius as an infrared cut-off successfully drives cosmic acceleration and yields an equation of state distinct from the cosmological constant, thereby resolving limitations found in earlier interacting models.
This study demonstrates that analyzing gravitational wave signals from eccentric, spin-precessing binary black holes using quasi-circular waveform models leads to significant biases in inferred source parameters, thereby highlighting the critical need for comprehensive waveform models that simultaneously account for both eccentricity and spin precession.
This paper introduces APRIL, a framework that augments supervised loss with auxiliary physically-redundant terms to improve convergence and accuracy in parameter estimation for large multi-system datasets, demonstrating up to an order-of-magnitude performance gain in gravitational wave parameter estimation compared to standard approaches.
This paper proposes a model of holographic dark matter derived from the infrared horizon cutoff rather than particle physics, which successfully accounts for dark matter density, explains the baryon-dark matter coincidence, and reverses the sign of a negative vacuum energy to match observational requirements.
This paper presents a novel exact solution to the Einstein-scalar-Maxwell equations describing a dynamical black hole immersed in a time-dependent electromagnetic field, which generalizes the Fisher-Janis-Newman-Winicour solution within the Fonarev framework and demonstrates how time dependence can cloak curvature singularities that would otherwise be naked in stationary limits.