3202 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 extends a previously developed generally covariant formalism to incorporate the diffusion of conserved charges, while clarifying the apparent distinction between chemical potential and diffusion terms.
This paper establishes a new viability condition for Galileon gravity by deriving a redshift-dependent upper bound on cosmic void depths, demonstrating that this void-based consistency test excludes approximately 60% of a linear parameter space and serves as a sharp, complementary filter for modified gravity theories.
This paper investigates the epicyclic motion, stable circular orbits, periapsis shift, and gravitational Larmor precession of charged particles around a weakly magnetized Kiselev black hole, highlighting how the combined effects of quintessence and magnetic fields distinguish this spacetime from Ernst or standard Kiselev geometries.
This paper constructs a nonperturbative Kontorovitch-Lebedev-Fourier (KLF) momentum space for quantum field theory on de Sitter spacetime, where the dS frequency serves as a unitary representation label, thereby transforming equations of motion into algebraic forms and streamlining the computation of in-in correlators and loop integrals through a group-theoretical framework.
Using the convergent Leaver method, this study reveals that massive scalar fields in Casadio-Fabbri-Mazzacurati brane-world black holes exhibit two distinct quasinormal mode classes characterized by either vanishing oscillation frequencies or damping rates as field mass increases, leading to mode disappearance and overtone replacement at critical thresholds.
This paper establishes two model-independent results for spacetimes with globally bounded tidal fields: a rigorous upper bound on accumulated geodesic deviation controlled by the inverse square root of the maximum electric Riemann eigenvalue, and the existence of a critical wavenumber that separates adiabatic from non-adiabatic perturbation transfer, both of which are validated numerically in extremal Hayward geometry.
This paper investigates the propagation of massive scalar fields in regular black holes supported by a phantom scalar field, revealing that the scalar charge induces an anomalous decay rate where the longest-lived modes correspond to lower angular momentum above a critical mass, while also demonstrating excellent agreement between WKB and Horowitz-Hubeny methods for quasinormal frequencies and clarifying how regularity affects greybody factors.
Deep multiband observations of the gravitational wave event S250206dm using the 2.5-meter WFST failed to detect an associated kilonova, thereby providing the most stringent optical constraints to date that exclude a standard AT 2017gfo-like event at 269 Mpc and disfavor a neutron star-black hole merger with a large mass ratio, offering new insights into the constituents of the mass gap.
This paper investigates a modified gravity model inspired by a generalized mass-to-horizon entropy relation, demonstrating that it successfully distinguishes itself from standard CDM frameworks by altering cosmic expansion and structure formation dynamics while satisfying thermodynamic equilibrium requirements.
This paper presents the first 3D GRMHD simulation of accretion onto a horizonless JMN-1 singularity, demonstrating that while it mimics black hole observations like M87*, it can be distinguished by detectable emission from within the shadow that would be hidden behind an event horizon.