Lens-Free Optical Detection of Thermal Motion of a Submillimeter Sphere Diamagnetically Levitated in High VacuumRemoveFang Xiong, Peiran Yin, Tong Wu, Han Xie, Rui Li, Yingchun Leng, Yanan Li, Changkui Duan, Xi Kong, Pu Huang, and Jiangfeng DuPhys. Rev. Applied 16, L011003 (2021)