3875 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 clarifies and validates the correspondence between gravitational wave ringdown quasi-normal modes and black hole imaging observables (critical impact parameter and Lyapunov exponent) for various modified spherically symmetric black hole geometries, demonstrating that the relationship remains surprisingly accurate even at low multipole numbers.
This paper introduces a novel covariant framework for characterizing photon surfaces in dynamical spherical space-times, extending the analysis of unstable null geodesics beyond stationary scenarios to model complex astrophysical processes like stellar collapse, accretion, and evaporation.
This paper proposes a new model in loop quantum cosmology that incorporates a Lorentzian term representing spatial scalar curvature, resulting in effective dynamics that resolve the classical singularity via a quantum bounce at a significantly lower volume than standard LQC while preserving its key qualitative features.
This paper presents the first calculation of the stress-energy tensor for a quantized massive scalar field in thermal states on a zero-tidal-force wormhole, demonstrating that the Morris-Thorne conditions for a traversable wormhole are satisfied only when the field's mass lies within a specific bounded interval and its temperature remains below a corresponding mass-dependent critical threshold.
COSMOS is a standalone, OpenMP-parallelized C++ numerical relativity code designed to simulate primordial black hole formation by solving the Einstein equations in 3+1 dimensions using specialized non-Cartesian scale-up coordinates and fixed mesh refinement to handle non-linear gravitational dynamics.
This paper explains the absence of late-time power law tails in numerical relativity waveforms of binary black hole mergers by demonstrating that oscillatory sources with high carrier frequencies and narrow spectral widths exponentially suppress the branch-cut excitation responsible for these tails, a mechanism that accounts for the difference between quasi-circular and eccentric or head-on collisions.
Using data from the LIGO-Virgo-KAGRA GWTC-4 catalog, this study presents the first detection of three distinct sub-populations of binary black holes with unique merger rates and delay-time distributions that depend on source properties like mass, mass-ratio, and spin, thereby ruling out a universal merger rate for all detected systems.
This paper proposes that cosmic acceleration arises not from a cosmological constant or new fields, but as a quantum mechanical effect caused by post-selecting the universe's wave function with a final boundary condition (a Chern-Simons soliton), which creates an apparent accelerating trajectory in a system with zero vacuum energy.
Using the harmonic superspace approach, this paper constructs linearized supersymmetric curvatures (generalizing scalar, Ricci, and Weyl tensors) expressed through fundamental analytic gauge prepotentials to serve as building blocks for off-shell supergravity invariants.
This paper proposes a string theory-inspired model where an evolving dark dimension links varying dark energy and dark matter masses through a scalar field, successfully fitting recent DESI and supernova data while naturally explaining apparent phantom behavior and satisfying Swampland and fifth-force constraints.