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 corrects a subtle oversight in K. Lorek et al.'s 2015 study on uniformly accelerated quantum clocks by identifying and removing an unphysical cross-wedge term from the decay probability equation, thereby ensuring the result adheres to the spatial separation of Rindler wedges and causal consistency.
This paper demonstrates that thermodynamically consistent generalized horizon-entropy models are severely constrained by background cosmological evolution, allowing only minor deviations from the standard Bekenstein-Hawking area law to preserve the observed radiation-matter-dark energy sequence and a CDM-like universe.
This paper demonstrates that the Bondi accretion profiles of a Damour-Solodukhin wormhole can closely mimic those of a Schwarzschild black hole even when the mimicking parameter is significantly larger than the traditionally assumed near-zero value, challenging the notion that must be extremely tiny for the wormhole to act as a black hole mimicker.
While acknowledging Hod's conclusion that a unified Thorne's hoop conjecture fails for Kerr-Newman black holes, this paper identifies a notable exception where the conjecture holds in a unified manner for both static and spinning tidal charged braneworld black holes when using the same quasi-local mass.
This paper investigates how spinning test particles probe the violation of the chaos bound in Kerr-Newman-AdS spacetime, revealing that the phenomenon is governed by a complex interplay where particle spin modulates thresholds, the negative cosmological constant enhances chaos, and black hole rotation can suppress charge-driven violations.
This paper presents a vector-tensor compact object that, unlike black holes or standard exotic alternatives, exhibits purely dissipative relaxation without oscillatory ringdown due to a hidden chiral symmetry that converts perturbation dynamics into one-way transport, with black-hole behavior emerging only as these relaxation modes vanish in the high-compactness limit.
This paper presents an exact vacuum spacetime solution derived from regular, asymptotically flat initial data that evolves into a region containing closed timelike curves while strictly satisfying the weak, dominant, and strong energy conditions.
This paper demonstrates that while environmental effects like accretion and modified gravity can formally degenerate in individual LISA massive black hole binary signals, hierarchical population analysis of realistic astrophysical scenarios shows these effects are unlikely to bias tests of general relativity or mimic deviations from it.
This paper proposes a prescription within the Schwinger-Keldysh formalism to compute a dissipative hydrodynamic action for holographic AdS gravity by realizing hydrodynamic degrees of freedom as relative diffeomorphisms between the black hole horizon and asymptotic boundaries, explicitly deriving the action to first order in derivatives and linking horizon symmetries to conjectured hydrodynamic symmetries of quantum chaos.
This paper presents experimental and theoretical evidence from a fiber-optical analogue demonstrating that Hawking radiation is generated through a simple, direct process rather than a complex cascaded one, while also measuring the resulting backreaction on the field.