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 proves that the potential previously identified for a scalar-field FLRW universe is the most general local potential allowing for non-trivial conformal Killing vectors by demonstrating that all other mathematical solutions to the integrability conditions are either singular or incompatible with the full equations.
This paper investigates how nonlinear Born-Infeld-type electrodynamics affects the spacetime geometry of a charged black hole, demonstrating that the parameter significantly modifies observational signatures such as light deflection, shadow size, and accretion disk images through changes in the effective photon geometry.
This paper proposes a quantum-enhanced sensing protocol using spin-motion squeezed states in two-dimensional ion crystals within a Penning trap to achieve super-Heisenberg scaling for detecting wave-like dark matter and high-frequency gravitational waves.
This paper demonstrates that static, spherical black holes with resonant hair are dynamically unstable and undergo spontaneous symmetry breaking, ultimately splitting into a bosonic lump and a bald black hole or imploding into one through non-spherical processes.
This paper explores a cosmological model incorporating Rényi entropic corrections to the Friedmann equations, demonstrating that it provides a robust, stable, and observationally consistent alternative to CDM by successfully explaining late-time cosmic acceleration while satisfying constraints from DESI, BAO, and gravitational-wave data.
This paper generalizes McCann's seminal work by characterizing timelike Ricci curvature lower bounds in globally hyperbolic spacetimes through the convexity of relative entropy along geodesics derived from a new class of Orlicz-type Lorentzian optimal transport problems.
This paper investigates how the competing effects of a nonlinear-electrodynamics magnetic charge and a Hernquist dark-matter halo influence the quasinormal modes, shadow observables, gravitational lensing, and neutrino-pair annihilation rates of a static, spherically symmetric black hole.
This paper demonstrates that the apparent instability of cosmological perturbations in quadratic gravity is a gauge-dependent artifact rather than a physical pathology by employing a gauge-independent approach in the Einstein frame.
This paper rigorously establishes that dynamical quantum non-locality originates from the superposition principle by proving that the Wigner propagator reduces to its classical counterpart if and only if the Hamiltonian is at most quadratic, and introduces a measurable signed divergence that unifies the understanding of five distinct quantum phenomena ranging from non-local games to metrological gains.
This paper generalizes the description of primordial gravitational waves from a two-mode to a three-mode Bogoliubov transformation, revealing that while large squeezing can render the universe classical if only two modes are considered, the full three-mode analysis preserves quantum characteristics via the quantum Poincaré sphere for any non-zero squeezing or non-zero coherent state components.