3839 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 oscillon formation in Einstein-scalar-Gauss-Bonnet gravity, finding that while the structures themselves remain stable and do not typically form black holes, large couplings can drive the system out of the effective field theory's regime of validity due to extreme local curvature, thereby highlighting the necessity of including non-linear backreaction effects.
This paper investigates and conjectures that vacuum AdS black holes maximize the holographic entanglement entropy growth rate among static asymptotically Schwarzschild-AdS black holes of the same entropy or mass density, providing proofs under the dominant energy condition and demonstrating via numerical results that this maximality generally holds for scalar field cases under fixed entropy, though it depends on the quantization scheme when energy is fixed.
This paper compares Euclidean and Hamiltonian methods for calculating 2D vacuum transitions, revealing that while standard approaches relate to generalized entropy differences and embed within an AdS/CFT AdS/CFT correspondence, the presence of islands alters this holographic structure and enables up-tunnelling.
This paper establishes a comprehensive framework for gravitational wave backreaction in gravity, deriving an effective energy-momentum tensor that reveals distinct observational signatures—specifically frequency-dependent phase shifts and amplitude damping—capable of constraining the Gauss-Bonnet coupling by 28 orders of magnitude using next-generation gravitational wave observatories.
This paper introduces a unified framework called Parametrized Post-Newtonian Cosmology (PPNC) that combines Solar System, astrophysical, and cosmological observations to provide theory-agnostic constraints on deviations from General Relativity, finding that average deviations across cosmic history are less than approximately 10%.
This paper demonstrates that a uniformly accelerated fermionic cavity coupled to a light external massive field exhibits a measurable enhancement in decay rates due to a geometric factor, whereas coupling to a heavy field results in exponential suppression, with the former regime being accessible via quantum simulation platforms.
This paper establishes that the Unruh effect is exponentially suppressed for massive fields, rendering direct detection impossible with current accelerations, and proposes a viable alternative strategy using a superconducting qubit coupled to a microwave resonator to engineer a low effective mass field that satisfies the necessary detection conditions.
This paper presents a local, dynamical completion of the scalar-gauge pair formulation that promotes gravitational coupling constants to conserved charges by introducing a massive scalar degree of freedom which preserves the original black hole solutions and thermodynamic relations while ensuring the coupling remains a global integration constant.
This paper presents a two-loop galaxy power spectrum calculation within effective field theory that achieves per-mille agreement with N-body simulations up to Mpc, significantly improving cosmological parameter constraints and offering a new probe for ultra-light axion dark matter in upcoming weak lensing surveys.
This paper investigates how ultracompact boson stars affect Event Horizon Telescope visibility amplitudes, finding that distinct modulations from additional photon rings only appear in spherical symmetry for specific inclinations and that rotating models often exhibit incomplete photon rings requiring an unstable prograde light ring for resolution.