2489 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 hydrodynamic properties of a strongly coupled non-Abelian plasma dual to a four-dimensional AdS black brane with a nonminimal curvature-gauge coupling, demonstrating that this higher-derivative interaction significantly modifies the DC color conductivity and shear viscosity-to-entropy density ratio, potentially violating their respective universal bounds depending on the sign of the coupling constant.
This paper demonstrates that the Sachs-Wolfe effect induces detectable anisotropies and spectral distortions in cosmological gravitational wave backgrounds, and proposes that cross-correlating these GW signatures with Cosmic Microwave Background anisotropies serves as a definitive "smoking gun" to confirm the primordial origin of such backgrounds.
This paper establishes a systematic framework within worldline effective field theory to define and compute the dynamical tidal response of neutron stars by matching gravitational-wave scattering amplitudes between the effective theory and full stellar perturbation theory, thereby resolving coordinate ambiguities and recovering key physical features like static limits, resonant behaviors, and dissipative effects.
This paper proposes a model where dark matter exists as self-bound quantum droplets formed by ultradilute Bose mixtures under Lee-Huang-Yang corrections, deriving an extended equation of state to demonstrate how halo properties depend on interaction parameters and quantum fluctuations while validating the model against observed Galactic rotation curves.
Using a hierarchical Bayesian analysis of 141 compact binary coalescences from GWTC-4 combined with galaxy data, this study constrains higher-dimensional gravitational wave propagation to a spacetime dimension of , finding results consistent with four-dimensional General Relativity while noting that the crossover scale remains poorly constrained.
This paper reviews the theory and detection prospects of low-frequency gravitational waves from core-collapse supernovae, specifically focusing on the linear memory signal generated by anisotropic neutrino emission and evaluating its observability with current and future gravitational wave detectors.
This paper argues that the Hamiltonian (or Hamiltonian constraint) alone cannot uniquely determine the tensor product structure of a quantum system's Hilbert space, thereby emphasizing that explicitly specifying the algebra of observables and their dynamical interplay is essential for defining a consistent general covariant quantum theory.
This paper presents 52 new numerical-relativity simulations of black-hole-neutron-star mergers focusing on tidal disruption, which are used to develop and validate the improved, multipolar TEOBResumS-Dalí model capable of accurately describing precessing, eccentric systems with enhanced accuracy at merger.
This paper computes the exact analytical inflationary trispectrum of primordial gauge fields arising from scalar and tensor exchanges in spectator models, revealing distinct momentum and angular dependencies that establish hierarchical relations with lower-order correlations and offer novel observational signatures for early-universe tensor interactions.
This paper presents updated observational constraints on the spatially flat CDM dynamical dark energy model using Planck 2018 and non-CMB data, finding that while the standard CDM model remains an excellent fit, current data mildly favor evolving quintessence-like dark energy and reveal tensions in the Hubble constant and CMB lensing amplitude that are partially alleviated by allowing the lensing consistency parameter to vary.