3949 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 proposes extending quantum mechanics to an enlarged Hilbert space that restores a fundamental symmetry between space-time and momentum-energy sectors, a dual-manifold structure that independently reproduces key cosmological phenomena such as dark energy and Hawking radiation.
This paper generalizes the Kerr-Schild gauge to non-null deformation vectors, demonstrating that such deformations yield finite curvature expansions and establishing that the resulting metric is Ricci flat if and only if the deformation vector is irrotational (and consequently geodesic) in the background spacetime.
This paper demonstrates that including quantum cross-correlation terms in the effective Hamiltonian of Brans-Dicke Bianchi I cosmology is essential for preventing unphysical divergences and ensuring consistent dynamics, revealing that these correlations smooth bounces, suppress or enhance anisotropy depending on the coupling parameter, and encode crucial Planck-scale information with implications for quantum gravity phenomenology.
This paper outlines the site selection constraints and viable deployment options for the LILA-Pioneer and LILA-Horizon lunar gravitational wave detectors, demonstrating that while their scientific return is independent of location, practical requirements such as seismic isolation, environmental protection, and accessibility significantly narrow the range of suitable lunar sites.
This paper proposes that by resolving the inconsistency of point-particle singularities in General Relativity through spacetime surgery and deriving a covariant backreaction term, the resulting modification to local particle trajectories can naturally explain flat galaxy rotation curves without invoking dark matter.
This paper proposes a single-field slow-roll inflation model featuring a sudden potential step at the end of inflation, which allows standard models like chaotic and Starobinsky inflation to produce a scale-invariant primordial spectrum () consistent with early dark energy solutions to the Hubble tension.
This paper argues that causal reference frames and time-delocalized subsystems are coordinate parametrizations of a single perspective-neutral object, demonstrating that while standard no-go theorems restrict unitary perspective transformations that preserve time foliation, such transformations become possible by either reshuffling past/future notions or by extending the process with quantum reference frames to provide a shared spatiotemporal scaffold.
This paper proposes that black hole mass can be reinterpreted as a topological charge arising from "bubble spacetimes" in first-order gravity, where the boundary between degenerate and nondegenerate metric phases coincides with the photon sphere and is characterized by a universal topological number, while the event horizon remains topologically trivial.
This paper investigates a three-dimensional black hole surrounded by Maxwell-Higgs vortices within linear gravity, revealing a ring-like system with quantized magnetic flux where the Bekenstein-Hawking temperature remains constant regardless of gravity or vortex parameters, indicating thermodynamic stability and unique horizon-induced perturbations in the magnetic profile.
This paper demonstrates that a chiral spin-chain model can simulate a binary black hole system to achieve high-fidelity quantum teleportation of information across event horizons by leveraging Hawking radiation-induced entanglement and optimal scrambling, thereby providing an experimentally accessible condensed matter platform for probing high-energy black hole phenomena.