2575 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 general reduction scheme that transforms arbitrary -term recurrence relations into a three-term form, thereby extending Leaver's continued-fraction method to calculate quasinormal modes in modified gravity theories like dynamical Chern-Simons gravity where standard methods fail due to higher-order couplings.
This paper demonstrates that estimating the galactic foreground for spaceborne gravitational wave detectors by analyzing the spatial distribution and population properties of resolved binary systems enables the successful detection of an injected stochastic background in the Taiji Data Challenge II.
This paper presents and validates a practical, phase-coherent mapping framework for pulsar timing arrays that preserves the full complex polarization state of gravitational waves, enabling a unified analysis of stochastic backgrounds, anisotropy, and individual sources directly from minimally processed sky maps.
This paper presents a canonical analysis of the Holst model for General Relativity with the Barbero parameter set to and unconstrained lapse and shift functions, deriving a complete system of 37 equations that confirms consistency with standard Einstein dynamics while revealing new differential constraints dependent on gauge choices, thereby establishing a viable foundation for extending Loop Quantum Gravity to dimensions beyond .
This paper demonstrates that cosmological models derived from generalized horizon entropies are viable within Big Bang Nucleosynthesis constraints, as their required parameters for late-time cosmic acceleration fall well within the bounds set by freeze-out conditions and light element abundances, despite the persistent lithium discrepancy.
This paper refutes the claim that classical gravity can generate entanglement, demonstrating that the previously reported effect was an artifact of incorrectly discarding specific transition amplitudes which, when properly included, ensure that an initially unentangled state remains factorized.
This paper develops linear perturbation theory for general Bianchi spacetimes in the Newtonian gauge, deriving equations for scalar and tensor modes—including a Bianchi-specific Mukhanov-Sasaki equation and modified Friedmann equations—to facilitate the comparison of anisotropic cosmological models with observational data like the CMB.
This paper demonstrates that while potential-driven early dark energy scenarios can be realized in gravity to alleviate the Hubble tension, they are generally excluded by stringent equivalence principle constraints, implying that nonperturbative effects or nontrivial mechanisms are necessary to reconcile such models with local gravity tests.
This paper proposes an asymmetrical two-brane model where the Higgs vacuum expectation value varies between branes, resulting in superheavy fermions on a second, observer-free brane that could constitute a component of dark matter and generate ultra-high-energy particles through inter-brane photon interactions.
This paper establishes that the universal time evolution of holographic complexity—characterized by a slope-ramp-plateau structure with linear growth and late-time saturation—is fundamentally driven by random matrix universality and a specific pole structure in the generating functions, which are proven to be necessary and sufficient conditions for these behaviors via the residue theorem.