2558 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 the equivalence between Ruhl's analytic definition of Toller matrices and the Feynman prescription in causal spinfoams, demonstrating that these objects can be represented as integrals over boost eigenvalues that reproduce the Wick rotation between Euclidean and Lorentzian spinfoam models.
This paper presents a covariant quantization of the first-order Einstein-Hilbert theory using path integral and BV formalisms, demonstrating the closure of the gauge algebra, deriving a novel trivial local symmetry, and establishing the quantum equivalence between first- and second-order formulations at the level of the effective action.
This paper investigates the dynamics of massive test particles and high-frequency quasi-periodic oscillations (HF QPOs) around a static black hole in nonlocal gravity, demonstrating that the nonlocal parameter enhances the effective potential and radiative efficiency while reducing the ISCO radius, and subsequently constrains the nonlocal parameter to and the black hole mass to based on QPO resonance models and observational data.
This paper presents a fast and effective technique using the intrinsic chirp mass spectrum of binary black holes to demonstrate that one year of Einstein Telescope observations can constrain the Hubble constant to 1% and the matter density parameter to 4% using gravitational wave spectral sirens.
This paper develops analytic asymptotic methods and a fast endpoint-constrained approximation to efficiently compute Fourier modes of post-Newtonian gravitational waveforms for highly eccentric binaries, achieving an accuracy within for modes up to .
This paper uses numerical relativity simulations to characterize the gravitational-wave phenomenology of equal-mass boson-star mergers, identifying distinct deviations from black-hole signals during late inspiral and merger phases—including the excitation of odd multipoles—and demonstrates that inspiral-merger-ringdown consistency tests can effectively resolve degeneracies between these signals and current waveform approximants.
This paper employs numerical simulations of coupled scalar fields with opposite kinetic terms to demonstrate that ghost-induced instabilities in classical field theories are not instantaneous but are instead mediated by nonlinear spectral energy transfer, allowing for long-lived metastable regimes controlled by spectral content, amplitude, and specific self-interaction potentials.
This paper proposes that the annihilation of domain walls can generate a distinctive two-peak gravitational wave spectrum by triggering an early matter-dominated phase via the decay of long-lived scalars, which amplifies induced signals while diluting the direct domain wall contribution, thereby offering a multi-band detection strategy to probe early universe symmetry breaking.
This paper demonstrates that fast radio burst dispersion acts as an unbiased tracer of the large-scale matter distribution, offering a powerful, feedback-independent cosmological probe capable of matching the statistical power of vast weak-lensing surveys with a significantly smaller number of localized events.
This paper presents an analytical construction of hairy meronic black hole solutions in four-dimensional Einstein-Maxwell-Yang-Mills theory with a conformally coupled scalar field, generalizing the charged MTZ and AC solutions to include self-gravitating non-Abelian gauge fields and exploring their non-Noetherian extensions.