3255 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 the dark energy problem and the tension by deriving exact cosmological solutions for a polytropic equation of state within a power-law gravity framework, utilizing Bayesian statistical analysis to constrain model parameters and evaluate their physical implications.
This study generalizes a Schwarzschild black hole surrounded by dark matter to a rotating Kerr black hole using the Newman-Janis Algorithm, revealing that while dark matter has negligible effects below a critical mass threshold, exceeding this limit causes significant structural expansion that challenges current observational constraints, thereby suggesting dark matter must be absent or limited in the immediate vicinity of astrophysical black holes.
The paper argues that the absence of a distinguished vacuum state in quantum field theory on curved spacetime undermines the physical reality of quantum states, while further challenging pragmatic realism by suggesting that the concept of a quantum state may be dispensable even in non-relativistic quantum mechanics and flat spacetime field theory.
This paper investigates the geodesic motion and epicyclic oscillations of particles around Einstein-Skyrme Anti-de Sitter black holes, revealing a unique signature where the radial frequency overtakes the orbital frequency at large distances, and demonstrates through MCMC analysis of X-ray binary and galactic center QPO data that this model consistently fits observations with a Skyrme charge parameter of approximately 0.6.
This paper investigates the massive scalar quasinormal spectra of charged Einstein-Maxwell-dilaton black holes using combined WKB-Padé and time-domain methods, revealing that increasing scalar-field mass induces robust quasi-resonant, long-lived oscillations with significant dilaton-dependent shifts relevant for ringdown spectroscopy.
This paper investigates the gravitational lensing of massless particles around a rotating, charged Kerr-Sen black hole immersed in magnetized plasma, analyzing how both homogeneous and inhomogeneous plasma distributions, along with the black hole's rotation and charge, influence light deflection and circular photon orbits compared to the vacuum case.
This paper investigates the motion of massive test particles and the resulting gravitational wave signatures around a magnetically charged black hole embedded in a Hernquist dark matter halo, revealing how dark matter parameters and magnetic charge influence stable orbital radii, periodic zoom-whirl trajectories, and gravitational wave polarizations.
This paper demonstrates that while Hybrid cosmology remains geometrically degenerate with CDM in the background expansion due to strict viability constraints, its unique perturbation sector—characterized by a suppressed effective gravitational constant and an amplitude compensation mechanism in —breaks this degeneracy and gains moderate statistical preference when constrained by redshift-space distortion data.
This paper investigates equatorial periodic orbits and their gravitational wave signatures in Euler-Heisenberg black holes surrounded by perfect fluid dark matter, revealing how quantum electrodynamic corrections and dark matter jointly modify orbital stability and produce distinct burst-like waveform features that serve as sensitive probes for strong-field gravity.
This paper evaluates the impact of detector baseline on binary black hole localization for next-generation gravitational-wave observatories, finding that baselines of 2300–3300 km offer an optimal compromise for a two-detector network while demonstrating that adding a third detector (such as LIGO-India or the Einstein Telescope) is crucial for eliminating localization multimodality and ensuring robust sky localization.