3 papers
gr-qc2026
Gravitational Lensing of Gravitational Waves: Towards a Higher-order Geometric-optics Approach
Zhao Li, Shaoqi Hou, Wen Zhao
In this work, we study the gravitational lensing of gravitational waves (GWs) by extending the geometric-optics approximation to higher order. With the help of the Newman-Penrose f…
gr-qc2025
Gravitational Lensing of Gravitational Waves: Spin-wave Optics through Black Hole Scattering
Zhao Li, Shaoqi Hou, Wen Zhao
Gravitational-wave (GW) scattering in strong gravitational fields is a central problem in GW lensing. Yet, conventional treatments based on asymptotic expansions suffer from diverg…
gr-qc2025
Rigorous calculation of scalar scattering in Schwarzschild background: the convergence of partial-wave series and Poisson spot
Zhao Li, Wen Zhao
Black hole (BH) perturbation theory and the scattering models provide a powerful framework for studying gravitational lensing at the wave-optics level. However, conventional calcul…