⚛️ 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

Multi-band cross-correlation dark sirens: Enhancing cosmological parameter and gravitational-wave bias constraints

This paper presents the first Fisher forecast demonstrating that multi-band gravitational-wave observations, combining space-based B-DECIGO and ground-based Einstein Telescope and Cosmic Explorer detectors, significantly enhance cosmological parameter constraints and enable unprecedented redshift-resolved measurements of gravitational-wave clustering bias compared to single-band or ground-only configurations.

Ji-Yu Song, Ya-Nan Du, Yue-Yan Dong, Jing-Fei Zhang, Xin Zhang2026-06-16
⚛️ quantum physics

Complete Relational Description of Spin in a Quantum Background

This paper demonstrates that by augmenting a single reference spin with a second large-spin system and applying group averaging, one can recover the standard quantum mechanical description of a spin relative to other quantum systems, overcoming the limitations of previous single-reference approaches that yielded only classical probabilistic mixtures.

Hannah Troger, Ofek Bengyat, Thomas D. Galley, Marios Christodoulou2026-06-16
⚛️ general relativity

Quasinormal Modes and Hawking Radiation of Black Holes with Primary Scalar Hair

This paper investigates the quasinormal modes, graybody factors, and Hawking radiation of a newly discovered family of asymptotically flat black holes with primary scalar hair in beyond-Horndeski gravity, demonstrating that the scalar hair leaves distinctive imprints on ringdown properties and emission rates while confirming that the associated naked singularities are quantum mechanically singular.

Roman Konoplya, Oleksandr Stashko, Zdeněk Stuchlík2026-06-16
⚛️ general relativity

Nonlinear Dynamical Regimes of Cosmological Frequency Combs

This paper demonstrates that Cosmological Frequency Combs naturally emerge as time-periodic attractors within a quintessence cosmology with an exponential potential, where numerical simulations reveal that coherent comb structures arise only within specific dynamical windows controlled by the fundamental frequency, background equation of state, and initial conditions.

Madhurendra Mishra, Oem Trivedi, Adarsh Ganesan2026-06-16
⚛️ general relativity

Benchmarking Exact, GP-Emulated, and Simulation-Based Inference for Late-Time Cosmology

This study systematically benchmarks exact MCMC, Gaussian Process-emulated MCMC, and neural Simulation-Based Inference on late-time cosmological datasets, demonstrating that while SBI offers order-of-magnitude computational savings with minor parameter shifts compared to exact methods, all three approaches yield consistent cosmological constraints and expansion histories.

Sai Swagat Mishra2026-06-16