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 establishes a rigorous quantum optical framework for analyzing diffraction-induced vacuum field injection in DECIGO's Fabry-Perot cavities, demonstrating that while such losses slightly increase radiation pressure noise, cavity detuning combined with homodyne detection and optical-spring locking can effectively mitigate these effects to enhance the detector's sensitivity to primordial gravitational waves.
This paper investigates a specific gravity model with effective curvature-matter interaction, demonstrating through statistical analysis of distance modulus data and a comparative study of early-Universe epochs that it predicts an earlier onset of structure formation and a higher matter-radiation equality redshift than standard CDM cosmology while remaining consistent with observed recombination data.
This paper investigates interacting -essence dark energy models with non-pressureless dark matter under two interaction scenarios, demonstrating through autonomous system analysis and extensive observational constraints that these models successfully reproduce cosmological evolution, yield values of 67–70 km/s/Mpc, and remain statistically competitive with the standard CDM model.
This paper proposes using linear Paul traps with single or multi-ion configurations to detect megahertz gravitational waves via graviton-photon conversion or relative-motion excitations, demonstrating that entangling vibrational qubits enhances signal probability by a factor of to surpass the standard quantum limit.
This paper presents a numerical study demonstrating that while massive particles scattering off Reissner-Nordström black holes are confined to a narrow range of deflection angles due to an event horizon, those interacting with naked singularities are scattered in all directions by a repulsive core, leading to distinct observable signatures in tidal disruption events.
This paper reinterprets the circular Unruh effect by demonstrating that the tree-level decay of uniformly rotating particles arises from the emission of negative-energy quanta due to the absence of a global vacuum state, thereby proving that such particles cannot be stable without invoking a thermal bath.
This paper introduces first-order noncommutative corrections to Einstein-nonlinear electrodynamics using a Drinfel'd twist and Seiberg-Witten map, deriving perturbative solutions for static, spherically symmetric dyonic black holes that account for both intrinsic electromagnetic nonlinearity and noncommutative geometric effects.
Using Einstein@Home computing resources to analyze LIGO data from observing runs O3a through O4a, this study conducts the most sensitive search to date for continuous gravitational waves from three central compact objects in supernova remnants, setting unprecedented constraints on their ellipticity and crustal anisotropy while identifying a single surviving candidate from G347.3-0.5 that warrants further investigation with upcoming data.
This paper analyzes the disk path integral of timelike Liouville theory as a two-dimensional toy model for quantum cosmology, computing one-loop wavefunctions in the fixed extrinsic curvature representation, conjecturing all-loop expressions, and proposing a well-defined inner product for Euclidean histories through the pairing of these path integrals.
This paper demonstrates that in Weyl-invariant Einstein-Cartan gravity, assumptions regarding post-inflationary reheating temperature and the equation-of-state parameter significantly influence predicted inflationary observables, thereby necessitating their consistent inclusion in phenomenological analyses.