4428 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 introduces a semi-agnostic framework for modeling black hole binary inspirals beyond General Relativity, demonstrating that at leading post-Newtonian order, the dynamics of a massless scalar field coupled to the metric can be described by a small set of universal parameters suitable for multi-source constraints and targeted field searches.
This paper formulates a local existence and uniqueness framework for first-order traceful radiation-gauge metric reconstruction on Kerr backgrounds with matter by decomposing the problem into Weyl, Ricci, and mass-angular-momentum sectors, and validates the approach using a thin-shell benchmark and a fluid torus to demonstrate the conditions required for a closed global formulation.
This paper establishes a framework to test string-derived dilaton and modulus sectors by linking Weak Equivalence Principle violations and secular clock drifts to low-energy scalar slopes, demonstrating that current MICROSCOPE and atomic clock data constrain these models while highlighting the potential for future isotope-specific experiments to significantly improve sensitivity.
This paper distinguishes ghosts from unstable particles in quantum field theory by analyzing their differing analytic structures and temporal behaviors, demonstrating that while ghosts survive asymptotically without decaying, they lack a physical particle interpretation due to multi-particle interference, a distinction that is further amplified in finite-time formulations.
This paper reviews the harmonic superspace formulation of higher-spin supergravity, deriving cubic interaction vertices between higher-spin supermultiplets and hypermultiplets to propose a consistent interacting theory utilizing conformal compensators.
This paper investigates linear cones over totally ordered fields by establishing their universal spanned vector spaces and continuous topologies, and further demonstrates that hyperbolic norms satisfying a polarization identity induce Lorentzian inner products, thereby linking Wick-rotated completeness to order-theoretic completeness.
This paper investigates cosmological inflation within gravity, demonstrating that nonlinear matter-geometry coupling can significantly alter inflationary dynamics and improve the observational compatibility of quadratic potentials with current Planck and BICEP/Keck constraints, unlike the standard General Relativity scenario.
This paper presents a comprehensive search for gravitational-wave backgrounds from various early Universe processes using combined LIGO-Virgo-KAGRA data from runs O1 through O4a, deriving stringent upper limits that significantly constrain a wide range of cosmological and high-energy physics models despite the absence of detectable signals.
This paper provides a comprehensive review of the black hole information problem by systematically establishing the necessary foundations in general relativity and quantum field theory in curved spacetime to demonstrate how the semiclassical prediction of black hole evaporation leads to information loss, thereby formulating the problem and analyzing the underlying assumptions that necessitate a resolution.
This paper establishes a unified thermodynamic framework for self-gravitating non-relativistic fluids that derives the most general non-dissipative fluid model, recovers classical and quantum hydrodynamic equations as special cases, and identifies conditions for "classical holography" that enable a single complex-valued wave-function representation.