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 proposes that the GW190814 event originated from a neutron star or low-mass black hole fragmenting from a neutrino-cooled collapsar disk and merging with the central black hole, potentially linked to the Type Ib supernova SN2019npv occurring 60 days prior, which yields a Hubble constant measurement of 70.5 km/s/Mpc.
This review synthesizes the hydrodynamic, relativistic, and quantum mechanisms governing Primordial Black Hole formation and evolution, challenging standard Hawking evaporation models by proposing Planck-scale relics and highlighting the potential for next-generation gravitational wave observatories to provide definitive evidence for their existence as dark matter candidates.
This paper analyzes small oscillations in axisymmetric Newtonian potentials to demonstrate that mass multipoles (specifically quadrupoles and octupoles) split radial and vertical epicyclic frequencies—mimicking the relativistic Shirokov effect—while gravitational dipoles produce no splitting but instead induce a measurable orbital-plane tilt, thereby offering complementary probes for characterizing the oblateness and center-of-mass offset of celestial bodies.
This paper formulates a ghost-free metric-affine scalar-torsion theory with parity violation, demonstrating that Schwarzschild and Kerr black holes in the Einstein-frame metric can support secondary disformal scalar hair when viewed from the physical metric frame, while maintaining regularity and specific scalar field profiles.
This paper proposes a two-field inflation model where domain walls nucleate over a finite duration rather than instantaneously, a mechanism that enhances scalar-induced gravitational waves to match the nanohertz stochastic background observed by pulsar timing arrays while predicting detectable signals for other gravitational-wave detectors.
This paper employs numerical relativity simulations of merging Kerr-Sen black holes to demonstrate the long-term stability of their associated dilaton and axion fields and confirms that black holes immersed in a scalar background, including initially unscalarized Kerr-Newman black holes, acquire and retain scalar hair.
This paper investigates rotating black holes in modified gravity (Kerr-MOG spacetime) by analyzing six stellar-mass black hole candidates, demonstrating that the modified gravity parameter significantly influences accretion disk efficiency and jet power, thereby creating a degeneracy with spin that can be constrained using observational data to identify viable parameter regions for interpreting black hole binary properties.
This paper investigates the properties of thin accretion disks around a Schwarzschild acoustic black hole within the Novikov-Thorne framework, revealing two distinct radiative regimes governed by a tuning parameter and identifying a sharp transition in disk observables near caused by changes in the marginally stable orbit radius.
This paper generalizes the calculation of fermionic tidal Love numbers to higher-dimensional Reissner-Nordström black holes, revealing that unlike their bosonic counterparts, these numbers remain non-zero for all angular momenta and dimensions (except in extremal cases) while exhibiting a dimension-dependent structure that simplifies in the infinite-dimensional limit.
This paper presents the first comparison of high-order post-Minkowskian predictions for generic-spin black hole scattering with numerical-relativity simulations, revealing strong-field precessional structures and sign changes in polar angles that are absent in perturbative results to improve eccentric and precessing waveform modeling.