Rolling bearing fault diagnosis based on quantum LS-SVM Yuanyuan Li, Liyuan Song, Qichun Sun, Hua Xu, Xiaogang Li, Zhijun Fang and Wei Yao EPJ Quantum Technol., 9 1 (2022) 18 Published online: 30 June 2022 DOI: 10.1140/epjqt/s40507-022-00137-y