3826 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 proposes and observationally constrains a cosmological model within gravity using a specific Hubble parameterization and multiple datasets, demonstrating that the model successfully describes the universe's transition from deceleration to acceleration, remains consistent with current observations, and exhibits quintessence-like behavior while satisfying key energy conditions.
This paper investigates whether generic, localized fluctuations in asymptotically flat spacetimes can successfully seed inflation, confirming that a fluctuation size several times the inflationary scale is necessary while highlighting how restrictive periodic boundary conditions in previous studies may have biased results.
This paper demonstrates that classical Liouville field theory cannot simultaneously preserve diffeomorphism invariance, Weyl invariance, and locality due to a genuine Virasoro center arising from a previously overlooked field-independent term, which forces a choice between Lorentz and conformal symmetry when generalizing the theory to curved space.
This paper employs a combined UV-IR regularization and renormalization group flow formalism to demonstrate that one-loop corrections to the curvature perturbation power spectrum in ultra-slow-roll inflation scale exponentially with the duration of the USR phase, potentially becoming non-perturbatively large and challenging the validity of perturbative frameworks for primordial black hole formation.
This paper proposes a diagnostic method using null-response channels in space-based gravitational wave interferometers like LISA and Taiji to distinguish monochromatic signals caused by ultralight dark matter from those generated by gravitational waves.
This paper validates a computationally efficient effective action approach for calculating holographic bubble nucleation by demonstrating its good agreement with direct gravity dual computations in a scalar field probe limit setup.
This paper proposes a formulation of classical gravitational entropy as a Noether charge applicable to various horizons without requiring a temperature concept, by introducing a correction to the covariant phase space formalism that accounts for the configuration-dependence of the generating vector field linked to Bousso's lightsheet proposal.
The paper introduces ASPIRE, a framework that leverages normalizing flows and Sequential Monte Carlo to efficiently update existing gravitational-wave posterior samples for alternative models without rerunning analyses, thereby significantly reducing computational costs while maintaining statistical robustness.
This paper demonstrates that the eccentricity of stellar-mass binary gravitational wave sources significantly enhances the detectability of environmental effects, potentially boosting signal-to-noise ratios by factors of to and making these effects ubiquitous in high-eccentricity populations observed by current and future detectors.
Using Bayesian MCMC analysis with the latest cosmological datasets, this study demonstrates that an exponential gravity model combined with massive neutrinos offers a viable dynamical dark energy framework that remains consistent with observations while slightly alleviating the Hubble and neutrino mass tensions compared to the standard CDM model.