3256 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 generalized conservation laws for massless spinning particles in spacetimes with hidden symmetries, demonstrating that the spin Hall equations are completely integrable in type D spacetimes and that a generalized Carter constant remains conserved for massive spinning particles regardless of the spin supplementary condition.
This paper presents a static, spherically symmetric black hole solution embedded in a Plummer dark matter halo and a Letelier cloud of strings, systematically analyzing its geometric properties, shadow, deflection angle, scalar perturbations, and thermodynamics to demonstrate that the string-cloud tension parameter drives leading-order modifications to all observables while the dark matter halo density provides only subdominant corrections.
This paper presents a framework for modeling galaxies within the geometry of the conservation group by dividing them into baryonic, dark matter, and outer regions to demonstrate how the theory naturally produces flat rotation curves and continuous models consistent with the radial acceleration relation.
This paper demonstrates that coupling the dilaton to a three-form field can lift the flat direction associated with spontaneous scale symmetry breaking without introducing explicit scale-violating operators, resulting in an exponential plateau potential when gravity is included.
This paper challenges the conventional view that gravity and inflation always ensure a classical universe by demonstrating that non-linear dynamics beyond slow roll can preserve non-classical features in cosmic structure, proposing Wigner function-based phase-space analysis as a method to detect these potential quantum signatures.
This paper demonstrates that within the GEVAG framework, promoting the horizon-area-dependent effective gravitational constant to the horizon neighborhood yields a corrected Hawking temperature with a second term that drives the temperature to zero at a minimum mass, thereby resolving the nonzero remnant temperature inconsistency found in Generalized Uncertainty Principle (GUP) approaches while providing general formulas for thermodynamic energy and the Bekenstein bound.
This paper presents an asymptotic analysis of the "simulated horizon" segment within the Collins spiral model of a dynamical gravastar, establishing a mathematical relationship between the initial conditions at the spiral's small-radius end and the resulting black hole mimicker's mass and other parameters at the large-radius kink.
This paper presents a unified theoretical framework for high-frequency gravitational wave transients from ultralight boson clouds around primordial black holes, concluding that while binary-driven signals are theoretically possible, their extreme weakness and low event rates render them undetectable by current experiments, thereby highlighting the need for significantly improved future high-frequency gravitational-wave searches.
This paper demonstrates that curvature perturbations in the early Universe, particularly over-densities, can enhance vacuum decay rates by reducing the initial bubble radius and triggering decay earlier, a finding confirmed through both analytical thin-wall approximations and numerical thick-wall solutions.
This paper establishes a novel framework linking the observable shadow of black holes, specifically Sagittarius A*, to their thermodynamic phase structure and microscopic interactions, demonstrating that shadow radius measurements can serve as a direct probe for testing General Relativity and alternative gravity theories.