3875 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 the Hamiltonian-based Batalin-Fradkin-Vilkovisky quantization of quadratic gravity, demonstrating the consistent incorporation of mandatory classical conditions and deriving field propagators (including those for negative-norm states) that yield a mass spectrum equivalent to Stelle's results but distributed differently among the fields.
This paper investigates Barrow and Tsallis Holographic Dark Energy models with a Granda-Oliveros infrared cutoff, demonstrating through Bayesian analysis of recent cosmological data that these generalized entropy frameworks are consistent with observations and offer a competitive, statistically preferred alternative to the standard CDM model.
This paper presents a theory-independent no-go theorem demonstrating that any framework incorporating superluminal transformations must abandon at least one fundamental assumption—such as finite information, time-symmetric content, past memory, or preferred causal ordering—thereby implying that ontic indeterminacy arising from such transformations stems from unbounded informational content rather than finite information.
This paper investigates a holographic network of coupled CFTs modeled by Gauss-Bonnet gravity, establishing conservation laws, stability constraints, and entropy bounds for Net-branes while demonstrating that such a framework enables traversable parallel universes with distinct geometries and physical laws that satisfy all energy conditions.
This paper presents the first analysis of time-delay cosmography using doubly lensed gravitational wave events, forecasting that while current and near-future detector networks (LVK O5/post-O5) will yield few qualified events, the future Einstein Telescope and Cosmic Explorer network will provide enough detections to precisely constrain the Hubble constant and dynamical dark energy parameters while simultaneously testing modified gravitational-wave propagation.
This paper utilizes Event Horizon Telescope observations of M87* and Sgr A* to constrain the quantum correction parameter of rotating holonomy-corrected black holes, demonstrating that these loop quantum gravity-inspired models remain viable alternatives to classical Kerr black holes by producing closed shadow rings consistent with current data.
This paper proposes a phenomenological model within Tsallis' statistical framework that introduces an effective chemical potential for non-relativistic matter, linking it to an Unruh-like temperature to derive a modified Hubble parameter that significantly enhances sensitivity to thermostatistical assumptions and potentially addresses the Hubble tension.
This paper presents a fully relativistic derivation of the elastic response of a thin rectangular plate to gravitational waves, yielding explicit closed-form solutions for induced displacements and energy deposition in materials with a vanishing Poisson ratio, alongside the computation of secondary gravitational wave emission from the oscillating plate.
This study demonstrates through three-dimensional simulations that while the low- instability robustly occurs in rapidly rotating core-collapse supernovae regardless of the nuclear equation of state, its specific multimessenger signatures—particularly the gravitational wave frequency—vary systematically with the equation of state, offering a potential diagnostic tool for probing dense-matter physics.
This paper investigates Loop Quantum Gravity-inspired scenarios where stable Planckian remnants of evaporating primordial black holes constitute Dark Matter, identifying a specific mass range ( kg) that naturally reheats the Universe and yields distinct observational signatures in gravitational waves and relativistic degrees of freedom.