Lens Modeling

We develop and use GIGA-Lens, the fastest GPU-accelerated lens modeling code, to reconstruct mass distributions of lensing galaxies and clusters. This work enables us to test models of dark matter, galaxy structure, and the expansion of the Universe using strong gravitational lenses with multiple sources or time-delay measurements. We have applied GIGA-Lens to real data, including:

1. GIGA-Lens
   • Gu et al. 2022
   • Huang et al. 2026 : GIGA-Lens 2.0, strong-lens modeling on multiple GPU nodes.
   • Github
2. Lens Modeling with Ground-based Imaging
   • Cikota et al. 2023
   • Urcelay et al. 2025
3. DESI Strong Lens Foundry Series
   • Huang et al. 2026 (Foundry I) : HST observations and modeling with GIGA-Lens.
   • Huang et al. 2025 (Foundry II) : DESI spectroscopy for strong lens candidates.
   • Agarwal et al. 2026 (Foundry III) : Keck spectroscopy for strong lenses discovered using residual neural networks.
   • Lin et al. 2025 (Foundry IV) : Spectroscopic confirmation of DESI lens candidates with VLT/MUSE.
   • Huang et al. 2025 (Foundry V) : A sample of HST-observed strong lenses modeled with GIGA-Lens.