4428 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 introduces a method for gravitational-wave population inference that fits Gaussian mixture models to event posteriors and uses importance sampling with flexible proposal distributions to reduce Monte Carlo variance and overcome sampling limitations without introducing detectable bias.
This paper establishes recursive integration-by-parts identities and a closed ODE system to symbolically reduce and numerically evaluate the nonlinear response kernels of Schwarzschild black holes at arbitrary perturbative orders, enabling the computation of quasinormal-mode coupling coefficients up to quartic order.
This paper investigates the evolution of quasi-(1+1) dimensional Klein-Gordon wavepackets for relativistic charged particles, determining that a Gaussian approximation for charge density remains valid only when the initial wavepacket width exceeds the Compton wavelength divided by the Lorentz factor, a constraint reflecting relativistic length contraction.
This paper establishes the local uniqueness of the Black String metric for small circle sizes by proving its infinitesimal rigidity and applying a fixed point theorem to show that no other Ricci-flat metrics exist in its neighborhood, while also demonstrating that a similar fixed point approach yields a global uniqueness result for a related scalar field toy problem.
This paper proposes that stellar-mass black hole pairs in AGN discs can form detectable multiple Extreme Mass Ratio Inspirals (mEMRIs) in the LISA band by surviving mean-motion resonances near the central supermassive black hole, predicting a high occurrence rate of ~10 events per year and providing distinct gravitational-wave signatures to break degeneracies with isolated EMRIs.
This paper presents the first comprehensive prediction of the complete gravitational-wave spectrum in the new inflation scenario, incorporating all known classical and quantum production mechanisms to reveal how high-frequency waves encode information about the inflaton and post-inflationary dynamics.
This paper proposes that a chiral gravitational wave background induces parity-odd EB and TB correlations in the cosmic microwave background through weak lensing effects, offering a viable observational probe for chiral gravitational waves that fits existing data.
This paper proposes that the imaginary part of the retarded Green's function in the dual CFT serves as a signature of the timelike singularity in a charged black brane, arising from exponentially small contributions at large real frequency that correspond to null geodesics reflecting off the singularity in the analytically continued bulk interior.
This paper argues that the non-unitarity observed in both black hole evaporation and cosmological evolution arises from the necessity of including backreaction effects, which lead to quadratic gravity theories containing ghosts that violate unitarity and result in a constant black hole entropy during evaporation.
This paper computes the full scalar-scalar-graviton vertex within the Asymptotic Safety framework using a mostly analytic approximation, demonstrating that it correctly reproduces expected logarithmic branch-cut structures and Weinberg's soft divergences while revealing that non-minimal operators are quantitatively as significant as the minimal kinetic vertex.