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 proposes a multi-scale hierarchical framework in General Relativity that resolves shell-crossing singularities by identifying a matter horizon as a causal boundary, thereby providing a robust theoretical foundation and improved boundary conditions for cosmological zoom-in perturbation theory and N-body simulations.
This review synthesizes recent advancements in black hole thermodynamics by utilizing topological numbers to categorize diverse black hole systems into universality classes, thereby analyzing critical points, phase transitions, and their implications for quantum gravity.
Using a holographic AdS/QCD model, this paper demonstrates that introducing an energy scale in anti-de Sitter space alters the topological class of black holes, thereby mapping the confined-deconfined phase transition to a change in topological charge that occurs at a finite critical temperature via the Hawking-Page transition.
This paper proposes that six-dimensional primordial black holes with masses ranging from sub-gram to grams, stabilized by the memory burden effect or near-extremality in a TeV-scale extra dimension framework, can serve as dark matter candidates while offering distinctive signatures for detection at future colliders and atmospheric neutrino experiments.
This paper introduces GWSkyNet-MassGap, a neural network model trained to rapidly predict the probabilities of gravitational-wave candidates containing components in the lower mass gap or being neutron stars, achieving high accuracy for high-mass mergers while highlighting the need for mass ratio information to resolve degeneracies in lower-mass systems.
This paper investigates a modified gravity model involving a scalar field and its kinetic term, demonstrating that while standard Gödel metrics are incompatible with the theory's scalar sector, Gödel-type solutions allow for both causal and noncausal configurations depending on the matter source, with scalar fields uniquely constraining the geometry to prevent the formation of closed timelike curves.
This paper employs 3+1 numerical simulations to demonstrate that kinetic screening in shift-symmetric scalar-tensor theories non-monotonically affects scalar emission from binary neutron stars—either suppressing or enhancing the quadrupolar amplitude depending on the ratio of the screening radius to the radiation wavelength—and reveals that while unequal-mass binaries revive a scalar dipole, cosmologically motivated parameters may only moderately suppress scalar radiation in systems like the double pulsar.
This paper proposes a non-supersymmetric baryogenesis mechanism where nonlinear dynamics of a complex scalar field with -breaking potentials dynamically generate a baryon asymmetry from symmetric initial conditions, with one specific potential model offering a mass-independent, predictive framework capable of explaining the observed baryon-to-photon ratio.
This paper establishes an effective field theory framework for the dynamical tidal response of spinning Kerr black holes to generic perturbations, deriving linear-frequency tidal Love numbers and response coefficients by matching worldline couplings to full perturbation solutions while accounting for spin-induced multipolar mode mixing.
This paper proposes a fabrication-tolerant hybrid metasurface-Bragg mirror design for the ET-Pathfinder gravitational-wave detector that combines a one-layer metasurface with a reduced Bragg stack to achieve high reflectance and significantly lower thermal noise than conventional coatings, even when accounting for manufacturing imperfections.