2693 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 reconstructs Einstein's mature view of gravitation by deriving the invariant spacetime interval from the Equivalence Principle and an extended Fermat Principle, interpreting gravity as a physical medium rather than independent geometry, and demonstrating that this dynamical approach reproduces the weak-field limit of General Relativity.
This paper investigates how modifying the Hamiltonian constraint in General Relativity and Hořava-Lifshitz gravity within a spherically symmetric LTB minisuperspace generates effective dark sources, revealing that while potential deformations in GR produce anisotropic stress failing to explain flat rotation curves, specific deformations in Hořava-Lifshitz gravity can yield positive dark matter scaling consistent with ghost-freedom and infrared recovery of General Relativity.
This paper demonstrates that gyroscopes transported along closed timelike curves are either universally periodic with the curve's period or generically non-periodic, a dichotomy that has significant implications for consistency principles in spacetimes admitting such curves.
This paper demonstrates that, when applied to the Starobinsky inflation potential with identical parameters, Lorentzian bump functions are more effective than Gaussian ones at amplifying the curvature power spectrum, thereby generating a greater abundance of primordial black holes and stronger secondary gravitational waves.
This paper demonstrates through numerical simulations that during spherically symmetric dust collapse, a unique, continuous evolution exists beyond shell-crossing singularities where a propagating shock wave forms and the stress-energy tensor transitions into that of a thin shell.
This paper investigates the impact of matter discreteness on gravitational wave propagation using a post-geometrical optics approximation, concluding that while curvature effects from localized particles significantly alter angular diameter distance, the validity of the approximation is limited because large curvature spikes lead to caustic formation that invalidates the method.
This paper provides a comprehensive guide for reconstructing and resampling posterior distributions from LIGO, Virgo, and KAGRA gravitational-wave observations using the Bilby library, offering techniques to modify analysis assumptions and improve efficiency for diverse astrophysical studies.
This paper generalizes the Connected Wedge Theorem to -to- holographic scattering scenarios by establishing a weaker necessary condition, a novel sufficient condition, and criteria for non-empty entanglement wedge intersections, thereby refining the geometric-entanglement correspondence for multi-particle interactions.
This paper establishes a gravitational equal-area law to analyze the topological transition of black hole shadows from a charge of 1 to -1 during cusp formation, revealing a critical point with a 1/2 exponent that places the system within the mean-field universality class and offers a new framework for testing fundamental physics beyond the Kerr paradigm.
This paper establishes the covariant phase space formulation of Weyl-transverse gravity on general boundaries, deriving its symplectic structure, Hamiltonian generators, and boundary conditions to clarify how its reduced gauge symmetry and fixed volume form modify the variational principle and first-law thermodynamics compared to General Relativity.