3255 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 rigorously demonstrates that the two common relativistic point-particle Lagrangians are not generally equivalent for arbitrary external potentials, as they yield different dynamical behaviors (chaotic vs. integrable) and Hamiltonian structures, though they coincide for electromagnetic interactions or vanishing potentials.
The paper demonstrates that relative holographic energy is equivalent to relative Hamiltonian energy.
This paper derives exact solutions for an anisotropic Bianchi type I cosmological model within a generalized Saez-Ballester-like theory featuring power-law scalar potentials and mixed kinetic couplings, demonstrating how specific constraints enable quintessence, quintom, and phantom scenarios that yield a volume evolution consistent with standard chiral multifield models while maintaining dynamic scalar fields.
This paper demonstrates that incorporating accretion disk environmental effects into the analysis of Extreme-Mass-Ratio Inspirals (EMRIs) enables the successful identification of these environments and significantly improves the precision of Hubble constant measurements by up to 20% through the dark siren method.
This paper establishes a complete open-channel operator formulation for the finite-cutoff JT gravity disk amplitude by combining geometric data with auxiliary problem structures to reproduce the known result, while demonstrating that the resulting bandlimited geodesic sector admits discrete representations and does not correspond to the thermal trace of a single lower-bounded self-adjoint Hamiltonian.
This study demonstrates that neutron star observables in hybrid equation-of-state models retain significant sensitivity to the choice of low-density nuclear matter models at commonly adopted transition densities (), implying that lowering the transition density is necessary to minimize systematic uncertainties and achieve model-independent predictions.
This paper extends the study of timelike entanglement inequalities in AdS-Vaidya holography to two subregions, confirming the validity of mutual information positivity and weak monotonicity for non-overlapping intervals while demonstrating that timelike strong subadditivity is generally violated even as subadditivity and the Araki-Lieb inequality hold.
This paper demonstrates that the CHRONOS torsion-bar detector, utilizing a differential gravitational calibrator to cancel Newtonian torque, can probe Yukawa-type deviations from Newtonian gravity with a sensitivity of at an 8-meter range, a performance ultimately limited by systematic uncertainties in source-mass geometry rather than statistical noise.
This paper introduces new generating theorems in General Relativity to derive a class of anisotropic, static, spherically symmetric solutions for modeling compact stellar interiors, with a specific focus on a constant-density geometry that serves as an incompressible limit comparable to the Bowers-Liang spacetime.
This paper systematically investigates the optical, dynamical, and thermodynamic properties of electrically charged black holes in Kalb-Ramond gravity surrounded by perfect-fluid dark matter, analyzing key features such as photon spheres, shadows, ISCOs, epicyclic frequencies, and Hawking radiation to connect these signatures within a unified framework.