3151 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 systematic errors in fast relativistic waveform models for Extreme Mass Ratio Inspirals, identifying that a multipole truncation of and a global relative flux interpolation error of are sufficient to ensure accurate parameter estimation for future space-based gravitational wave observatories.
This paper proposes that civilizations can overcome interstellar travel constraints and the Fermi paradox by utilizing time dilation near supermassive black holes to achieve galaxy-spanning expansion within a human lifetime using feasible Type II energy levels, while simultaneously offering a physical basis for the "dark forest" hypothesis through the vulnerability of such high-speed vessels.
Building on previous findings that deterministic continuous wave searches are the most effective method for detecting individual supermassive black hole binaries, this paper analyzes the milestones for characterizing these sources, revealing that gravitational wave frequency and strain are constrained first, followed by sky location, with the timing and precision of these constraints depending significantly on the source's frequency, sky position, and the specific geometry of the pulsar timing array.
This paper characterizes the existence of gravitational radiation at infinity in spacetimes with a cosmological constant of any sign by utilizing the properties of asymptotic super-momentum, thereby providing a reliable definition that generalizes the standard News tensor approach and yields consistent results for known exact solutions.
This paper establishes a covariant differential-form framework for defining non-closed scalar charges in four-dimensional Einstein-scalar-Gauss-Bonnet gravity, revealing a bulk obstruction that vanishes under shift-symmetry and providing a unified geometric interpretation of spontaneous scalarization and black hole thermodynamics through the Smarr formula.
This paper demonstrates that distinguishing between neutron stars and black holes in compact binary populations using only gravitational wave tidal measurements will require hundreds of events, a threshold unlikely to be met by current advanced detectors but achievable with next-generation facilities like the Cosmic Explorer and Einstein Telescope.
This paper investigates the emergence of semiclassical spacetime in many-body quantum systems with quenched disorder by computing their spectral functions, finding that the SU(M) Heisenberg model exhibits exponential tails similar to the SYK model and the p-spin model displays infinite quasiparticle excitations, while ultimately proving that such exponential spectral tails preclude low-energy operators from detecting nontrivial bulk causal structures.
This paper analyzes DESI DR2 Lyman- and galaxy BAO data combined with supernova and CMB observations to find moderate evidence for dynamical dark energy favoring a Quintom-B scenario (), though the statistical significance of this preference drops to inconclusive levels () when Type Ia supernova datasets are included.
This paper presents asymmetric, regular, and asymptotically flat rotating wormhole solutions in Einstein-Dirac-Maxwell theory, supported by a complex non-phantom spinor field and electromagnetic fields, which connect two identical Minkowski spacetimes with potentially different masses and global charges while being fully determined by the throat parameter, spinor frequency, and electromagnetic coupling constant.
This paper presents an auto-encoder model that accelerates the generation of aligned-spin SEOBNRv4 gravitational waveforms by approximately four orders of magnitude compared to native implementations, achieving speeds of about 50 microseconds per waveform on a GPU with a median mismatch of , making it suitable for high-volume applications like rapid sky localization despite not yet reaching full production-grade accuracy.