2593 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 a proof-of-principle mechanism for resolving the cosmological constant problem by introducing a momentum-dependent non-linear interaction in a 4D scalar field theory that breaks translational invariance, thereby generating a dynamically lowered UV cutoff for the Universe while preserving the Planck-scale cutoff required for local particle physics experiments.
This paper presents a more realistic formulation of Abbott et al.'s analysis by demonstrating that sequential quantum measurements, modeled via Gaussian wave packets, fundamentally alter the fractal geometry of particle paths by shifting the Hausdorff dimension, with nonselective evolution reducing roughness and selective evolution requiring feedback control to stabilize trajectories.
This paper demonstrates that, contrary to the conventional belief that acceleration universally degrades quantum entanglement, the $1-3$ bipartite entanglement of a four-qubit cluster state remains strictly maximal under all relativistic accelerations, revealing a novel phenomenon of complete entanglement freezing.
This study demonstrates that Rastall gravity offers a viable phenomenological framework for mitigating the hydrostatic mass bias in galaxy clusters by effectively aligning hydrostatic mass estimates with observed baryonic or lensing masses, although it does not universally outperform other modified gravity models under standard statistical criteria.
This paper presents a Kerr black hole solution with a nontrivial vector field in bumblebee gravity, demonstrating that this solution can be derived from a spherical counterpart using the Newman-Janis algorithm, thereby providing a rare example of the algorithm's validity beyond general relativity.
This paper proposes a non-minimally coupled running curvaton model that successfully accommodates DESI's preference for dynamical dark energy with phantom crossing while preserving early-universe predictions and potentially alleviating the Hubble tension.
This paper extends a previous theorem to demonstrate that in generic scalar-vector-tensor theories of gravity, the metric field equations on FLRW spacetimes universally reduce to the Einstein equations with an effective perfect-fluid source, regardless of the specific theory's complexity, while the cosmological dynamics remain determined by the accompanying scalar and vector field equations.
This paper demonstrates that in Doubly Special Relativity, both local modified dispersion relations and rainbow-metric approaches yield a universal near-horizon black-hole temperature scaling determined solely by the ratio of deformation functions , with corrections becoming significant only in the Planck regime.
This paper proposes a covariant Hamiltonian quantization framework for teleparallel equivalents of general relativity that utilizes non-singular field-strength Hamiltonians to avoid the frozen formalism of canonical general relativity, introducing a Tomonaga-Schwinger-type evolution equation without a preferred time coordinate as a new approach to nonperturbative quantum gravity.
This paper reformulates stellar structure equations as a dynamical system to demonstrate that the maximum mass of stellar sequences corresponds to a fixed point in the relativistic regime, a framework that explains equation-of-state-insensitive relations and suggests that the pulsar J0740+6620 likely lies near this maximum only if a strong first-order phase transition occurs just above its central density.