⚛️ Category

gr-qc

3873 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.

⚛️ general relativity

Ultraviolet Structure of Real-time Gravitational Wave Linear Response in a Resonant Scalar Field

This paper utilizes the Schwinger-Keldysh formalism and adiabatic regularization to analyze the ultraviolet structure of real-time gravitational wave linear response in a resonant scalar field, identifying specific time-dependent divergences that require new local counterterms and revealing a renormalization mismatch with the tadpole stress tensor that is attributed to the off-shell nature of the background.

Han Lai, Atsuhisa Ota2026-06-16
⚛️ general relativity

Kinetic Theory of Cosmological Magnetogenesis at Second Order: A New Density-Gradient Source and Comparison with the Harrison Mechanism

This paper derives a complete second-order kinetic theory for cosmological magnetogenesis, identifying a new density-gradient source that significantly enhances the Thomson-scattering mechanism and demonstrating that the Harrison bulk-flow mechanism dominates under specific conditions, with all resulting seed fields exceeding the galactic dynamo threshold.

Bob Osano2026-06-16
⚛️ general relativity

Analytic results for slow-roll curved-space inflation and exponential potentials

This paper derives analytic templates for scalar and tensor primordial power spectra in curved-space inflation transitioning from kinetic dominance to slow-roll, demonstrating their applicability to recovering spectral tilts while noting that curvature-assisted single-exponential models in open universes fall outside this framework due to their non-negligible second Hubble slow-roll parameter.

Dimitrios Tsimpis, Govind Venugopal2026-06-16
⚛️ general relativity

Detecting Gravitational Wave Memory in the Next Galactic Core-Collapse Supernova

This paper presents a detection method combining Linear Prediction Filtering and Matched-Filtering to identify gravitational wave memory from Galactic core-collapse supernovae, demonstrating that while the approach can detect signals from progenitors like D9.6-3D at 1 kpc, it remains insufficient for distances of 10–100 kpc, a conclusion reinforced after correcting an error that had previously underestimated neutrino-induced waveforms.

Colter J. Richardson, Haakon Andresen, Anthony Mezzacappa, Michele Zanolin, Michael G. Benjamin, Pedro Marronetti, Eric (…)2026-06-15
⚛️ general relativity

Reference Frames and the Ontology of General Relativity. Re(l)ality: The View From Nowhere vs. The View From Everywhere

This paper argues that the ontology of relational observables in General Relativity admits two equally precise interpretations—the "View from Nowhere," which posits a shared frame-free reality underlying partial perspectives, and the "View from Everywhere," which treats each relational description as a comprehensive reality without a shared substrate—while demonstrating that a frame-independent translation map can structurally connect these perspectives to counter objections against strong perspectivalism.

Nicola Bamonti2026-06-15