Ying-Hai Wu

Abstract Fractional quantum Hall (FQH) states are exotic quantum many-body phases whose elementary charged excitations are anyons obeying fractional braiding statistics. While most FQH states are believed to have Abelian anyons, the Moore–Read type states with even denominators – appearing at half filling of a Landau level (LL) – are predicted to possess non-Abelian excitations with appealing potential in topological quantum computation.

We study quantum phase transitions in Bose-Fermi mixtures driven by interspecies interaction in the quantum Hall regime. In the absence of such an interaction, the bosons and fermions form their respective fractional quantum Hall (FQH) states at certain filling factors. A symmetry-protected topological (SPT) state is identified as the ground state for strong interspecies interaction. The phase transitions between them are proposed to be described by Chern-Simons-Higgs field theories.

On the Cover Optical image of a dual-gated MoS2 homobilayer moiré superlattice device. From the article: Giant Correlated Gap and Possible Room-Temperature Correlated States in Twisted Bilayer MoS2 Fanfan Wu, Qiaoling Xu, Qinqin Wang, Yanbang Chu, Lu Li, Jian Tang, Jieying Liu, Jinpeng Tian, Yiru Ji, Le Liu, Yalong Yuan, Zhiheng Huang, Jiaojiao Zhao, Xiaozhou Zan, Kenji Watanabe, Takashi Taniguchi, Dongxia Shi, Gangxu Gu, Yang Xu, Lede Xian, Wei Yang, Luojun Du, and Guangyu Zhang Phys. Rev. Lett.