2489 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 reveals that black hole perturbations with Gaussian potential modifications exhibit a continuous line of exceptional points characterized by anisotropic spectral instability, where parameters along the line preserve quasinormal modes while deviations trigger scaling, accompanied by specific topological invariants and pseudospectrum growth that confirms enhanced spectral sensitivity at these non-Hermitian degeneracies.
This paper investigates primordial black hole formation in quadratic gravity by combining a first-order perturbative analysis around General Relativity with a non-perturbative Einstein-frame numerical study of the scalaron field to determine the critical overdensity threshold for collapse.
This paper investigates constant-roll inflation within a -exponential potential model under Palatini quadratic gravity, demonstrating that specific parameter ranges yield predictions for the spectral index and tensor-to-scalar ratio that align with Planck and ACT DR6 observational data while producing a viable non-Gaussian signature.
This study demonstrates that while a reflecting boundary and detector non-uniformity generally suppress tripartite quantum coherence harvesting, they can simultaneously enhance and extend the range of entanglement harvesting, revealing that coherence is more spatially accessible and robust than entanglement, which exhibits richer, geometry-dependent activation features.
This paper proposes a method to realize quintom dark energy, favored by recent DESI DR2 observations, by coupling dark energy to the Nieh-Yan density within teleparallel gravity, thereby eliminating perturbative instabilities associated with the crossing and predicting parity violation in gravitational waves.
This paper utilizes the Lewis-Riesenfeld invariant method to demonstrate that in non-singular bouncing cosmologies, the evolution of quantum circuit complexity remains finite at the bounce and serves as a geometric memory that strongly correlates with and quantifies post-bounce cosmological particle production.
This paper constructs strong and weak energy conditions for massive and massless stringy extended objects in higher-dimensional cosmology with a cosmological constant, deriving a universal equation of state parameter constraint () and elucidating its relationship to four-dimensional point particle limits.
This paper demonstrates that key structural properties of cosmological correlators in (E)AdS, including cutting rules, tree theorems, BCFW recursion, and soft limits, can be systematically derived from their flat-space counterparts by representing them as flat-space amplitudes dressed with auxiliary propagators.
This paper constructs exact analytic solutions for asymptotically flat black holes in bumblebee gravity with a temporal vector field, deriving thermodynamic formulas that verify and extend previous numerical findings by revealing new phenomena such as unbounded charge-mass ratios, traversable wormholes, and complex heat capacity behaviors.
This paper details the updates to software tools and the successful investigation and mitigation of narrow spectral artifacts in LIGO data during the fourth observing run, aiming to minimize non-astrophysical noise bands to enhance the discovery potential for persistent gravitational-wave signals.