3949 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 applies the Multipolar Post-Minkowskian formalism to compute the gravitational waveform, energy, and linear momentum emissions for a two-body system in radial fall up to the 2.5 Post-Newtonian order, while also evaluating inertial force contributions at the 4.5PN level to facilitate future high-precision calculations.
This study uses redshift-space distortion measurements combined with background cosmological data to constrain the Generalized Uncertainty Principle's deformation parameter , revealing a systematically negative value that allows for a weak-to-strong observational preference for the modified model over standard CDM depending on the specific supernova dataset used.
This paper establishes a consistent first-order formalism for General Relativity at spatial infinity using the Holst action, demonstrating that relaxed boundary conditions and specific parity constraints allow for the full BMS group including supertranslations while proving that the Immirzi parameter modifies Lorentz charges but leaves supertranslation charges invariant.
This paper unifies frequentist and Bayesian approaches to identifying strongly lensed gravitational-wave events by deriving posterior odds that demonstrate how selection effects, while influencing the Bayes factor, ultimately cancel out to yield a detection metric insensitive to the total number of events in the catalogue.
Using flexible models on the GWTC-4 catalog, this study finds no current evidence for a sharp pair-instability mass gap near 40–50 solar masses, suggesting that high-mass binary black holes are likely not dominated by hierarchical mergers and instead constraining the potential gap's lower bound to approximately 57 solar masses.
This paper establishes exact and linearized relations between the kinematical tensors (expansion, shear, and vorticity) of freely falling test particles and the various polarization modes of gravitational waves in metric theories of gravity, offering a novel theoretical framework for interpreting these modes and their phenomenology.
This study demonstrates that non-minimally coupled squared-Quartic Hilltop inflation in both Einstein and Jordan frames successfully reconciles the tension between standard inflationary models and recent DESI-ACT observations by predicting a scalar spectral index and tensor-to-scalar ratio consistent with the new data under both weak and strong coupling regimes.
This study demonstrates that even with optimistic signal-to-noise ratios and merger rates, next-generation gravitational wave detectors like Cosmic Explorer can only achieve marginal precision in estimating the maximum neutron star mass () from post-merger signals, highlighting the critical need for improved high-frequency sensitivity to significantly reduce uncertainties.
This paper constructs an analytical model of a thick, magnetized accretion disk around a rotating Horndeski black hole to demonstrate that while scalar hair significantly reduces total flux and ring brightness through enhanced gravitational redshift, it uniquely influences the maximum interferometric diameter of the first photon ring, offering a robust observable for constraining black hole hair with future space-based interferometry.
This paper constructs holographic tensor network models based on partial-entanglement-entropy (PEE) thread tessellations of AdS space, demonstrating that assigning quantum states to network vertices reproduces the exact Ryu-Takayanagi formula by equating minimal surface cuts with geometric area.