2615 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 argues that we cannot empirically determine whether the universe had a beginning, demonstrating that common defenses of a cosmic origin rely on confirmation theory errors and that, due to extensions of the Malament-Manchak theorems, observers in almost all classical spacetimes cannot distinguish between models with a past singularity and those that are beginningless or lack the requisite time ordering.
This paper establishes the existence of nonlinear wave operators and proves small-data asymptotic completeness for the Maxwell-Higgs system with scalar potential on subextremal Kerr spacetimes by constructing a gauge-invariant scattering map that relies on a transfer principle from linear estimates, provided the absence of superradiant instability.
This paper demonstrates that wave-optics effects induced by cold dark matter subhalos in the mass range of to produce detectable, percent-level frequency-dependent amplitude and phase distortions in strongly lensed gravitational waves within the LISA band, offering a novel probe of subgalactic dark matter structure inaccessible to electromagnetic observations.
This paper proposes that Hermiticity in quantum mechanics is a symmetry arising from global inner product conservation, which becomes obstructed by causal horizons in black hole geometries, thereby inducing effective non-Hermitian dynamics that unify gravity, entropy production, and the generalized second law of thermodynamics.
This paper demonstrates that a lunar laser interferometer can directly probe the kinetic sector of the effective field theory of dark energy by measuring horizon-scale metric fluctuations, thereby enabling constraints on the dark energy sound speed and kinetic operators that are inaccessible to traditional background expansion probes.
Employing the STOchastic LAttice Simulation (STOLAS) code, this study investigates the spatial profiles and topological structures of curvature perturbations in multi-waterfall hybrid inflation models, validating the stochastic-N algorithm while revealing how stochastic noise drives defect reconnection and imposes upper bounds on perturbations in cubic potential scenarios.
This paper defines Carroll black holes as solutions to Carroll gravity that exhibit thermal properties and possess Carroll extremal surfaces, demonstrating these features in various examples including Carroll versions of Schwarzschild, Reissner-Nordström, BTZ, and generic 1+1 dimensional dilaton gravity black holes.
This study utilizes combined cosmological datasets (BAO, CC, SNIa, and growth rate data) to constrain viscous fluid models within various gravity frameworks, finding that while exponential and logarithmic models are statistically rejected, the non-viscous power-law model remains a robust alternative to CDM.
This paper employs the Lanczos algorithm to investigate Krylov complexity in the early universe as an open system across inflation, radiation, and matter domination epochs, revealing distinct dissipative behaviors, the similarity of complexity evolution across various inflationary potentials, and deriving new evolution equations for squeezing parameters via Meixner polynomials to demonstrate rapid decoherence-like effects.
This paper offers a pedagogical introduction to black hole information loss for readers with a background in special relativity and quantum mechanics, arguing that no true paradox exists and that proposals deviating from established theories are inherently contradictory.