2026 arXiv Learning PDEs for Portfolio Optimization with Quantum Physics-Informed Neural Networks Letao Wang, Abdel Lisser, Sreejith Sreekumar, and 1 more author Apr 2026 arXiv 2025 Quantum Sci. Technol. Subspace preserving quantum convolutional neural network architectures Léo Monbroussou, Jonas Landman, Letao Wang, and 2 more authors Quantum Science and Technology, Mar 2025 DOI HTML