2649 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 investigates gravitational wave radiation from periodic orbits in regular black hole spacetimes, demonstrating distinct differences from singular Schwarzschild geometry through orbit characteristics, strain profiles, and power spectra to aid in developing detection templates for LISA while providing new analytical expressions for Schwarzschild radiation.
This paper identifies a resonant amplification mechanism in rotating stellar core-collapse supernovae, where the coupling between proto-neutron star oscillations and inner core epicyclic frequencies significantly enhances gravitational wave and neutrino emissions, potentially making these events detectable by current and next-generation observatories to reveal the explosion mechanism.
This paper formulates an effective field theory for coupled dark energy and dark matter by integrating vector-tensor and non-relativistic fluid sectors, deriving linear perturbation equations and stability conditions, and demonstrating that energy-momentum transfers can reduce the effective gravitational coupling of dark matter at low redshifts.
This study demonstrates that the TianQin mission can constrain the local gravitational effects of dark matter by comparing high-precision orbit determinations at low and high altitudes, achieving a sensitivity of that significantly surpasses existing bounds for the solar system and the Galaxy.
This paper establishes a geometric duality between null infinity and extremal horizons via spatial inversion, demonstrating that this mapping creates a one-to-one correspondence between Newman-Penrose conserved quantities at infinity and a newly derived tower of exactly conserved near-horizon gravitational charges, even for non-conformally isometric extremal Kerr-Newman black holes.
This paper presents a novel expansion method for general relativity that is compatible with both ADM and Kol-Smolkin decompositions, deriving explicit results up to order in the ADM framework and order in the Kol-Smolkin framework to demonstrate their duality and provide all-order insights.
This paper investigates the Sagnac and Mashhoon effects in rotating graphene systems, demonstrating that while the Sagnac fringe shift is governed by the electron's vacuum mass and acquires an additional -phase shift from the lattice's Berry phase, the Mashhoon fringe shift retains its conventional form dependent on the Fermi velocity.
This paper presents a singularity-free de Broglie–Bohm quantum bounce cosmology that is strongly compatible with Planck 2018 CMB data, places a stringent upper bound on the bounce scale, and offers a potential mechanism to mitigate the - tension through a unique scale-dependent anticorrelation.
This paper demonstrates that the Atacama Cosmology Telescope's observed preference for positive running of the scalar spectral index significantly constrains ultra-slow-roll inflationary models, making the production of massive primordial black holes difficult while still allowing asteroid-mass primordial black holes to potentially constitute all dark matter.
This paper demonstrates that a constrained Brownian bridge evolves along an m-geodesic on the statistical manifold of Gaussian distributions, thereby establishing a physical realization of information geometry where random processes follow informational straight trajectories and highlighting the fundamental physical role of asymmetric informational distance.