Optical control of integer and fractional Chern insulators - William Holtzmann; Weijie Li; Eric Anderson; Jiaqi Cai; Heonjoon Park; Chaowei Hu; Takashi Taniguchi; Kenji Watanabe; Jiun-Haw Chu; Di Xiao; Ting Cao; Xiaodong Xu (Nature, 2026)