cosmological expansion 1gravitational waves 1nonlinear interactions 1numerical simulations 1turbulence 1
From the 1 of 3 linked papers with an AI index.
3 papers
gr-qc2026
Nonlinear Gravitational Wave Interactions in an Expanding Universe
Fan Zhang, Lee Lindblom, Zhi-Peng Peng
The paper numerically investigates how gravitational waves interact nonlinearly in an expanding universe, revealing energy cascades toward longer and shorter wavelengths that follo…
astro-ph.IM2026
Efficient Evaluation of Gravitational Lensing Amplification Factors: A Deep Learning Framework
Fan Zhang, Qikai Zhang, Qiyuan Yang +2
Wave optics is essential for analyzing lensed gravitational waves (GWs), yet evaluating the diffraction integral is computationally expensive. We present a Sinusoidal Re…
gr-qc2026
Solving Einstein's Equation Numerically on Manifolds with Non-Orientable Spatial Slices
Fan Zhang, Lee Lindblom
This paper presents solutions to Einstein's equation -- and the numerical methods used to construct them -- that describe simple cosmological models on manifolds with compact non-o…