3285 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 presents a comprehensive ringdown modeling framework for effective-one-body waveforms describing eccentric equatorial orbits around a Kerr black hole in the test-mass limit, utilizing a light-ring-crossing-based ansatz to accurately capture high-spin and high-eccentricity merger dynamics and extend naturally to dynamical capture scenarios.
This paper investigates the observational signatures of magnetically charged Anti-de Sitter black holes in string-inspired Euler-Heisenberg theory, demonstrating that magnetic charge alters photon trajectories, orbital frequencies, and the innermost stable circular orbit, while twin-peak quasi-periodic oscillation data constrain the magnetic charge parameter to be less than approximately 0.2 times the black hole mass at the 1 sigma confidence level.
This paper demonstrates that in a scalar theory with a fourth-order derivative term, strong attractive interactions can generate bound states of massive ghosts and normal fields, offering a potential mechanism for ghost confinement that may resolve unitarity violations in quadratic gravity.
This paper investigates the photon sphere and black hole shadow of a dilatonic dyonic black hole in a 4D model with a scalar field and Abelian gauge field, deriving a unique unstable circular null geodesic radius and establishing relations for the shadow angle and critical impact parameter.
This paper establishes that cusp formation in black hole shadows exhibits universal characteristics—including topological charge transitions, an equal-area law, and critical scaling—that are independent of specific spacetime metrics, applying to both Kerr black holes with running Newton coupling and rotating traversable wormholes.
This paper proposes a method for counting black hole microstates in Loop Quantum Gravity for rotating (type II) isolated horizons by decomposing the horizon into locally nonrotating concentric rings to restore a local Chern-Simons description, thereby successfully incorporating angular momentum and satisfying the first law of black hole mechanics.
This paper investigates the dynamics of magnetized and electrically charged particles around a Schwarzschild-Bertotti-Robinson black hole, demonstrating how the magnetic field parameter influences innermost stable circular orbits, orbital stability, and chaotic behavior through analyses of Poincaré sections and power spectral density.
This paper proposes a Dark Dimension scenario where the Casimir energy of bulk fields, specifically requiring extensions beyond a minimal gravity-plus-neutrino setup to ensure a positive potential, drives the radion field to act as a quintessence candidate for dark energy that aligns with recent DESI BAO observations.
This paper presents a phenomenological model for the merger-ringdown phase of gravitational waves emitted by a small compact object plunging into a Kerr black hole from an eccentric equatorial orbit, utilizing the effective-one-body framework to characterize how eccentricity and relativistic anomaly influence waveform features across various spin and harmonic modes for the upcoming \texttt{SEOB-TMLE} model.
This paper presents a first-principles analytical solution for the time evolution of the separation, spin, and orbital angular momentum vectors of spinning, eccentric binary black holes at the second post-Newtonian order, offering a significant improvement over previous heuristic models despite minor limitations in spin oscillation accuracy.