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 establishes that near-extremal Kerr black holes exhibit parametrically distinct scaling laws governing photon windings and polar focusing, revealing a continuous transition between extremal and subextremal lensing hierarchies rather than a discontinuous jump.
This paper investigates the formation of subdominant, asteroid-mass primordial black holes from primordial magnetic fields generated during a non-singular ekpyrotic bounce, demonstrating how finite-wavenumber cutoffs and critical collapse prescriptions constrain the model's background parameters to satisfy cosmological overclosure bounds.
This paper extends the universality of the infinite tower of gravitational wave tail terms from the Newtonian limit to the first subleading post-Newtonian order for nonrelativistic gravitational scattering, demonstrating that these corrections are fully determined by asymptotic trajectories and confirming a previous relativistic conjecture.
This paper presents numerical simulations of low-mass, moderately eccentric black hole-neutron star mergers to validate eccentric waveform models and demonstrate that while eccentricity has a negligible impact on the remnant black hole, it significantly affects the remnant disk mass and that strong magnetic fields efficiently damp trapped -mode oscillations in the resulting accretion disks.
This paper investigates a canonically quantized Bianchi I universe within the Page-Wootters framework, demonstrating that the big-bang singularity is resolved as the conditional probability density vanishes at zero volume and analyzing how the spectral properties of the quantum state govern temporal coherence between distinct clock states.
This paper investigates whether discrete bound state perturbations inside a Schwarzschild black hole can statistically account for its entropy, finding that while the angular degeneracy of these states scales with the horizon area, achieving full entropy saturation requires a significant energy fraction that necessitates ignoring backreaction effects.
This paper resolves the discrepancy between the unique tracial state and semiclassical bulk correlations in de Sitter static patch holography by introducing heavy-clock states that reproduce -point functions, while extending the framework to include time-reversal symmetry via a generalized observer Hamiltonian and deriving this model from Einstein gravity coupled to Brown-Kuchař dust.
This paper introduces a pseudo-spectral boundary value approach to gravitational lensing and spin precession, demonstrating its effectiveness in analyzing quantum corrections in loop quantum black hole spacetimes where such effects are most significant for slowly moving particles while recovering a universal spin flip in the ultra-relativistic limit.
This paper generalizes a previous study on binary-lens amplification of starlight (BLAST) to describe how supermassive black hole binaries can be identified in non-active galactic nuclei through distinct electromagnetic transients, ranging from single-peaked flares to quasi-periodic signals that track the system's orbital evolution.
This paper proposes using a quenched, shell-shaped Bose-Einstein condensate as an analog gravity simulator for a positively curved, expanding universe, demonstrating how temporal changes in interaction strength trigger spontaneous pair production and Sakharov-like oscillations that can be quantified via entanglement measures extracted from the power spectrum.