2558 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 constructs an approximate Fermi normal coordinate system for a boosted cosmic test mass within FLRW spacetime to compare its resulting metric with that of a comoving observer and to analyze the circular gravitomagnetic field generated by the mass's motion.
This paper presents an exact anti-de Sitter black hole solution coupled with a Kalb-Ramond field and nonlinear electrodynamics, analyzing its horizon structure and demonstrating that Lorentz-violating parameters and nonlinear electrodynamics induce rich thermodynamic behaviors, including nonmonotonic temperature profiles, deviations from the area law, and first-order phase transitions.
This paper presents a canonical quantization framework for all minisuperspaces derived from symmetry reductions of the Einstein-Hilbert Lagrangian that satisfy the principle of symmetric criticality, covering a wide range of cosmological and black hole geometries, and solves the resulting Wheeler-DeWitt equation both with and without the imposition of derived conformal symmetries.
This paper employs the Bronnikov-Konoplya-Pappas parametrization to analyze electromagnetic perturbations and quasinormal modes in both isolated and galactic Damour-Solodukhin wormholes, deriving observationally viable metrics constrained by Sgr A* shadow data and revealing that while oscillation frequencies remain stable, damping rates are highly sensitive to galactic compactness.
This paper proposes a modified Bousso-Polchinski model for string theory flux vacua that, when applied to the Schöller-Skarke database of Calabi-Yau fourfolds, demonstrates that the vast majority of configurations naturally yield a sufficiently small vacuum energy spacing to support Brown-Teitelboim membrane nucleation transitions, thereby satisfying cosmological constraints on the universe's age.
This study demonstrates that Extreme Mass-Ratio Inspirals (EMRIs) observed by LISA can constrain Lorentz symmetry breaking in bumblebee gravity to an uncertainty of order by analyzing how the bumblebee parameter modifies orbital evolution and gravitational waveforms, particularly for eccentric orbits.
By means of the Cosmicflows-4++ reconstruction and a covariant scalar averaging formalism, this study shows that spatial curvature contributes significantly (approximately 10 %) to the local energy budget on scales up to 300 Mpc/h, whereas kinematic backreaction remains negligible (at most 1 %), indicating that the local universe has not yet converged to the global CDM background.
This study demonstrates that the Laser Interferometer Space Antenna (LISA) can distinguish between stochastic gravitational-wave backgrounds from eccentric and circular stellar-mass black hole binaries, thereby enabling the identification of formation channels, the separation of environmental effects from vacuum evolution, and the setting of constraints on eccentricity for ground-based detectors.
This paper investigates trilinear structures as a natural extension of Hirota's bilinear formalism in integrable systems, demonstrating that the stationary axisymmetric Einstein equations decompose into a universal cubic trilinear kernel governing the highest-derivative sector, a structure shared by both the and Tomimatsu--Sato solutions.
This paper presents a comparative adaptive ray-tracing framework to analyze the optical appearance of rotating black holes embedded in Einasto-type and cored-NFW dark matter halos, revealing that while Einasto geometries remain close to Kerr, cored-NFW configurations produce distinct deviations in shadow size and lensed structures that could help break degeneracies between spin and dark matter parameters.