3826 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 modular solid-state detector composed of ultra-pure sapphire crystals read out by cryogenic single-phonon sensors to simultaneously search for the primordial stochastic gravitational-wave background and light primordial black hole binaries in the challenging GHz frequency range.
This paper proposes a horizon-microstructure model for four-dimensional AdS black holes where the combinatorics of partially occupied microscopic sites naturally yield the Bekenstein-Hawking entropy with logarithmic corrections, which is thermodynamically justified through a Smarr-consistent excitation enthalpy involving a chemical potential and an AdS control parameter.
The paper introduces the DARK-HIDE framework to demonstrate that while current Event Horizon Telescope shadow-size constraints cannot distinguish between black hole images distorted by dark matter and those modified by hidden dimensions due to a strong degeneracy, local photon transport properties like escape cones retain the necessary information to break this ambiguity.
This paper establishes a field-theoretic framework for temporal entanglement entropy in 2D conformal field theories via analytic continuation of twist correlators, which holographically identifies boundary-anchored complex geodesics as the relevant bulk saddles and confirms a complex extremal surface prescription that accurately reproduces field theory results across various excited states and quenches while uniquely determining the quantized imaginary part of the entropy.
This paper transcribes the AMPS black hole firewall paradox to analogue gravity systems, demonstrating that post-Page-time unitarity in a sonic black hole necessitates a non-Hadamard "acoustic firewall" state with a singular energy density that yields a specific, falsifiable prediction for differential phonon calorimetry in Bose-Einstein condensates.
This paper constructs models for first- and second-order Fermi acceleration within frameworks of deformed and violated Lorentz symmetry, demonstrating that such modifications lead to distinct energy spectra—including potential intense high-energy decays—and comparing these theoretical predictions with Pierre Auger observational data.
This paper demonstrates that hierarchical Bayesian inference applied to simulated LISA extreme mass-ratio inspiral (EMRI) catalogues can effectively constrain massive black hole population parameters and disentangle mixed subpopulations with as few as 20 detections, even under conditions of model misspecification.
Using worldline quantum field theory and advanced computational techniques, this paper calculates conservative black hole scattering contributions at fifth post-Minkowskian and second self-force orders, resolving a spurious velocity divergence through a novel prescription to ensure consistency with radiative effects and post-Newtonian limits.
This paper analytically demonstrates that the temporal correlations arising from photon-graviton conversion in a magnetic field violate the Leggett-Garg inequality, offering a novel method to test the quantum nature of gravity.
This paper investigates a unified dark-fluid model based on the Lambert function, demonstrating that it provides a consistent description of late-time cosmic acceleration and yields a Hubble constant consistent with Planck 2018 but in tension with local measurements when constrained by DESI BAO, Pantheon+ supernovae, and direct data.