3 papers
cond-mat.str-el2025
Minimal Fractional Topological Insulator in half-filled conjugate moiré Chern bands
Chao-Ming Jian, Meng Cheng, Cenke Xu
We propose a "minimal" fractional topological insulator (mFTI), motivated by the recent experimental report on the signatures of FTI at total filling factor in a…
cond-mat.str-el2024
Mixed-state quantum anomaly and multipartite entanglement
Leonardo A. Lessa, Meng Cheng, Chong Wang
Quantum entanglement measures of many-body states have been increasingly useful to characterize phases of matter. Here we explore a surprising connection between mixed state entang…
quant-ph2024
Strong-to-Weak Spontaneous Symmetry Breaking in Mixed Quantum States
Leonardo A. Lessa, Ruochen Ma, Jian-Hao Zhang +3
Symmetry in mixed quantum states can manifest in two distinct forms: strong symmetry, where each individual pure state in the quantum ensemble is symmetric with the same charge, an…