Fundamental limitations on optimization in variational quantum algorithms. - Hao-Kai Zhang; Chengkai Zhu; Geng Liu; Xin Wang 022 (CoRR, 2022)

Statistical Analysis of Quantum State Learning Process in Quantum Neural Networks. - Hao-Kai Zhang; Chenghong Zhu; Mingrui Jing; Xin Wang 022 (NeurIPS, 2023)

Exponential Hardness of Optimization from the Locality in Quantum Neural Networks. - Hao-Kai Zhang; Chengkai Zhu; Geng Liu; Xin Wang (AAAI, 2024)