2593 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 presents a novel exact solution in Freund-Nambu scalar-tensor gravity that generalizes the Janis-Newman-Winicour naked singularity spacetime, analyzing its impact on particle dynamics and accretion to derive the first observational constraints on the model's parameters using twin-peak quasi-periodic oscillation data from microquasars.
This paper demonstrates that autoparallel curves associated with torsion-free, non-metric-compatible affine connections can be derived from a variational principle by explicitly constructing an action functional through the systematic solution of the inverse problem of the calculus of variations and the associated Helmholtz conditions.
This paper investigates warm inflation beyond the Markovian limit by demonstrating that finite correlation times in thermal baths generate colored noise which suppresses the primordial scalar power spectrum, thereby establishing a direct link between non-Markovian memory effects and the ratio of bath temperature to the Hubble scale while quantifying their impact on key cosmological observables.
This paper investigates the quantum stability of a timelike topological wormhole by computing the one-loop backreaction of a massive scalar field, finding that depending on finite counterterms, quantum effects can either stabilize or destabilize the structure while preserving its traversability.
This paper investigates the black hole shadow in a renormalization group-improved Bonanno-Reuter spacetime within a plasma medium, using Event Horizon Telescope observations of Sgr A* to constrain quantum gravitational parameters while highlighting the current observational degeneracy between plasma and quantum-gravity effects.
This paper presents the first systematic study of early-to-late cosmic evolution in gravity, demonstrating that a well-motivated model constrained by Big-Bang Nucleosynthesis bounds and supernova data successfully reproduces the observed late-time acceleration with quintessence-like behavior while remaining consistent with early-time physics.
This paper constrains a specific Dark Energy model using differential age data and applies it to study the continuous mass growth of Schwarzschild black holes through accretion and mergers within the standard hierarchical formation scenario.
This paper mathematically and graphically evaluates the effective gravitational potentials, circular orbits, and Innermost Stable Circular Orbits (ISCOs) of neutral and charged particles around Schwarzschild, Kerr, Reissner-Nordström, and Kerr-Newman black holes, revealing how electromagnetic interactions and gravitational radiation influence orbital stability and energy loss.
This paper presents a fast emulation framework for the matter power spectrum in a binned phenomenological modified gravity model, demonstrating that combining large-scale structure with CMB lensing data enables precise Bayesian constraints on the effective gravitational constant and gravitational slip across redshift bins.
This paper proposes a novel formulation of four-dimensional gravity derived from a topological field theory with global symmetry that becomes local, utilizing Weyl spinor-valued 1-forms to encode frame-field data and offering a framework particularly well-suited for discretization and quantization.