Effect of external magnetic fields on practical quantum random number generator Yuan-Hao Li, Yang-Yang Fei, Wei-Long Wang, Xiang-Dong Meng, Hong Wang, Qian-Heng Duan, Yu Han and Zhi Ma EPJ Quantum Technol., 10 1 (2023) 49 Published online: 20 November 2023 DOI: 10.1140/epjqt/s40507-023-00206-w