2558 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 numerically compares post-Newtonian formulations and scalar perturbation schemes for simulating binary star interactions with supermassive black holes, revealing that while methods agree for million-solar-mass black holes, significant discrepancies in binary separation and eccentricity arise near billion-solar-mass black holes, particularly with the pair-wise post-Newtonian approach.
This paper proves that the Lorentz-FitzGerald contraction is the unique deformation required for a moving resonant cavity to preserve its spherical-harmonic eigenstructure, thereby deriving both length contraction and time dilation as necessary consequences of phase closure in a mechanical wave medium without additional assumptions.
This paper proposes a cosmological uncertainty relation based on a deformed commutation for the scale factor that introduces a geometric correction to the Friedmann equation, offering a unified framework where a single parameter can explain both late-time cosmic acceleration and a non-singular Big Bang bounce without requiring new particles or fields.
This paper argues that cosmological tensions ( and ) should be treated as global consistency conditions forming a "consistency triangle" with the growth index, demonstrating that this multi-probe constraint severely restricts the viable parameter space of gravity models and their extensions.
This paper establishes a quantitative trade-off derived from unitarity and semiclassical assumptions, proving that any observable exterior quantum hair on a black hole necessarily implies a quantifiable violation of horizon smoothness, thereby demonstrating that the no-hair theorem and exact horizon smoothness are mutually incompatible under unitary evolution.
This paper proposes a method to identify host galaxies of compact binary mergers by focusing on the most luminous galaxies within gravitational-wave localization volumes, demonstrating that for well-localized events, this approach significantly narrows down candidate hosts to a small number with a low probability of random association, thereby enabling future constraints on merger formation histories and Hubble constant measurements.
This paper constructs an analytic continuation of Darwin variables to provide a unified, real parametrization for all types of Schwarzschild geodesics—including bound, scattering, and plunging trajectories—and demonstrates their utility in tracking orbital evolution across the separatrix using a single phase variable.
This paper demonstrates that the zero-mass limit of the partition function for covariant locally localized gravity on a Karch-Randall braneworld yields a theory containing a massless graviton and a decoupled massive vector, rather than the standard Randall-Sundrum II model, by deriving a fully covariant description to compute the one-loop partition function.
This paper argues that while physical theories are coordinate-independent, the specific choice of coordinate frames in static axisymmetric vacuum spacetimes significantly influences the effective potential and observable phenomena, such as rotation curves, thereby necessitating a careful review of local and global symmetries to correctly interpret observations within general relativity.
This paper investigates the optical appearance and shadow characteristics of scalar hairy black holes with an inverted Higgs potential using ray-tracing and thin accretion disk models, revealing that while increasing the scalar field at the horizon enlarges the shadow and disk size, the brightness remains similar to Schwarzschild black holes, allowing for potential mimicry and enabling constraints on the potential parameter using M87 and Sgr A* observations.