3919 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 demonstrates that near-degenerate resonance poles in open-wave systems naturally organize into a centered two-pole block on a finite observation window, yielding a stable carrier-plus-first-jet waveform structure that avoids the instability of treating the signal as two independently resolved damped sinusoids.
This paper presents a positive definite formulation for calculating vacuum decay tunneling actions in the presence of spherically symmetric impurities that reduce symmetry from to , generalizing the tunneling potential method and providing analytic examples with arbitrary wall thickness.
This paper establishes that the renormalized stress-energy tensor of a massless scalar field in a collapsing null-shell spacetime approaches the Unruh state with a non-zero power-law tail at late times, a result driven by the branch-point singularity in the radial wave equation's Wronskian and confirmed by both analytical bounds and numerical data.
This article employs Sbierski's more recent -inextendibility techniques to prove that a certain class of spatially flat FLRW spacetimes without particle horizons cannot be extended as manifolds.
This paper investigates gravitational lensing and deflection angles in generalized Ellis-Bronnikov wormholes within a five-dimensional warped braneworld, deriving analytic and numerical results that demonstrate how the throat steepness parameter and extra-dimensional effects produce distinct signatures in lensing observables like the Einstein ring radius and image positions.
This paper proposes a real-time effective field theory approach to calculate work statistics for extracting work from a thermal bath coupled to a qubit, demonstrating that spin or topological qubits outperform fermionic or spinless alternatives in heat engine and refrigerator efficiency due to their underlying quantum statistics.
This paper proposes a phenomenological extension of the PNJL model where curvature-sensitive QCD confinement dynamics generate an effective dynamical vacuum component that drives late-time cosmic acceleration, offering a statistically competitive alternative to CDM that is consistent with current low-redshift cosmological observations.
This work investigates the detectability of non-rotating metrics of exotic compact objects in the Galactic Center using simulated polarized flare data from GRAVITY and GRAVITY+ and finds that while current uncertainties prevent distinguishing these models from standard black holes, future improved sensitivity could enable such tests, provided astrophysical complexities are adequately accounted for.
This paper presents static and expanding cosmological solutions containing benign negative mass singularities that yield a positive Komar mass, reduce the effective cosmological constant, and drive cosmic acceleration, thereby offering a potential alternative explanation for dark energy while challenging the notion that all naked singularities must be avoided.
This study demonstrates that while delays in the commissioning of next-generation gravitational-wave detectors minimally affect signal-to-noise ratios, they significantly degrade localization capabilities and multi-messenger potential, a challenge that can be effectively mitigated by the concurrent operation of current-generation detectors like LIGO India.