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 provides explicit formulas for the spherical solutions of the Dirac equation in an expanding Friedmann-Lemaître-Robertson-Walker universe with a de Sitter scale, demonstrating how initial states such as hydrogen-like atom wave functions or Minkowski spherical waves propagate within this spacetime.
This paper demonstrates that the emission of numerous light string axions from primordial black holes can significantly enhance superradiant dark matter production and the formation of "micro-boson stars" by increasing black hole spin, while simultaneously ensuring that the resulting axion contribution to relativistic degrees of freedom at recombination remains negligible.
This paper proposes a heterotic string-inspired two-field warm inflation model involving an axion and a dilaton, demonstrating through numerical analysis that viable inflation is predominantly axion-driven and effectively single-field, with thermal corrections generally suppressing the role of the dilaton.
This paper proposes that General Relativity can be modeled as a degenerate Otto cycle in emergent gravity, where introducing work-producing legs generates controlled Lorentz and energy-momentum violations that drive late-time cosmological acceleration.
This paper introduces FPIC, a new Fortran-based General Relativistic Particle-In-Cell code utilizing spherical Kerr-Schild coordinates and a novel hybrid particle pusher to accurately simulate plasma dynamics and energy extraction mechanisms, such as the Penrose process and Blandford-Znajek luminosity, in stationary and axisymmetric black-hole spacetimes.
This paper proposes a new non-local ultraviolet completion for general inflationary models that preserves their successful classical predictions while resolving previous issues with renormalizability and stability, thereby demonstrating the consistency of the inflationary paradigm with a well-defined quantum theory of gravity.
This paper derives an analytical approximation for the graviton propagator within Asymptotic Safety, demonstrating that the theory preserves General Relativity's field content without introducing extra poles or violating unitarity and causality, as spurious poles vanish in the limit of higher-order derivative expansions.
This paper elucidates the physical distinction between ghosts and unstable particles in quantum field theory by analyzing their differing asymptotic behaviors and analytic structures, demonstrating that ghosts do not decay but are masked by multi-particle interference, thereby confirming the absence of freely propagating ghost particles in the asymptotic limit.
This study demonstrates that the proposed CHRONOS detector is a viable platform for characterizing dominant Rayleigh-wave-induced gravity-gradient noise and detecting prompt gravitational signals from nearby earthquakes (e.g., Mw 5.2 within 90 km) in the sub-Hertz frequency regime, offering a unique capability to observe geophysical gravity perturbations before seismic waves arrive.
This paper derives a distinct analytic form for the near-horizon linear polarization of synchrotron emission in Kerr spacetime, demonstrating that the leading-order pattern depends on black hole spin and source angle while higher-order corrections encode electromagnetic field structure, thereby extending previous equatorial and off-equatorial analyses to offer a new probe of rotating black holes and gravito-electromagnetic interactions.