2693 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 reconstructs the effective potential and Gauss-Bonnet coupling function in Einstein-Gauss-Bonnet gravity using the scalar spectral index and tensor-to-scalar ratio consistent with ACT data, demonstrating that these functions are not inversely proportional, contrary to previous assumptions.
This paper presents numerical simulations of black hole-neutron star mergers with near-equal mass ratios to address gaps in parameter space, revealing limitations in current gravitational waveform models while confirming the accuracy of remnant mass predictions and demonstrating that these systems produce detectable kilonovae.
This paper presents a perturbative analytical solution for weakly Proca-charged black holes to investigate how a non-zero photon mass influences particle dynamics and observational signatures, finding that while the effect is negligible for black hole shadows, it yields testable constraints on the Proca parameter using GRAVITY instrument data from Galactic center flares, particularly for supermassive black holes.
This paper presents an analytical prescription for the evolution of orbital eccentricity in spinning compact binaries, demonstrating that while the equation of state has a mild impact on binary neutron stars (except for subsolar masses), it significantly influences binary boson stars, offering a potential tool to constrain the exotic nature of compact objects and their formation channels.
This paper establishes a quasi-locally conserved charge associated with Killing spinors for Hermitian non-Kähler Einstein 4-manifolds, evaluates it across known gravitational instantons, and demonstrates that generic gravitational perturbations admit a closed 2-form measuring the resulting charge variation, thereby generalizing prior results on linearized black hole mass.
This paper analyzes the equatorial stability of dust particle orbits within a charged, rotating disc of dust in Einstein-Maxwell theory, finding that all orbits are stable for a specific charge and marginally stable for .
This paper investigates the interplay between tripartite quantum-memory-assisted entropic uncertainty and quantum coherence for GHZ and W states of fermionic fields in Einstein-Gauss-Bonnet black hole backgrounds, revealing distinct dimensional dependencies and contrasting robustness behaviors between the two states across different observer configurations near the horizon.
This paper refutes the claims made by Hawkins & Garcia-Bellido regarding the OGLE microlensing survey, reaffirming that primordial black holes and other compact objects cannot constitute a substantial fraction of the Milky Way's dark matter halo due to the lack of detected microlensing events.
This paper investigates how explicit diffeomorphism violation in gravity alters primordial gravitational wave signals, deriving modified spectral predictions and establishing observability limits for current and future detectors like aLIGO, LISA, and DECIGO, while confirming that constraints from Big-Bang Nucleosynthesis on relativistic degrees of freedom remain consistent with existing bounds on gravitational wave speed.
This paper derives analytical templates for primordial tensor power spectra in curved inflationary universes, revealing that spatial curvature induces characteristic large-scale features like low- cut-offs and oscillations which offer a potential discriminant for curvature in future CMB observations.