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A team led by scientists and engineers at the University of Washington has announced a significant advancement in developing fault-tolerant qubits for quantum computing. In a pair of papers published June 14 in Nature and June 22 in Science, they report that, in experiments with flakes of semiconductor materials each only a single layer of atoms thick they detected signatures of “fractional quantum anomalous Hall” (FQAH) states. The team’s discoveries mark a first and promising step in constructing a type of fault-tolerant qubit because FQAH states can host anyons strange “quasiparticles” that have only a fraction of an electron’s charge. Some types of anyons can be used to make what are called “topologically protected” qubits, which are stable against any small, local disturbances.

Hong kongUniversity of hong kongHong kong generalEric andersonChong wangXiaowei zhangYinong zhangJiaqi caiKenji watanabeWang yaoTakashi taniguchiXiaodong xuJames urtonWilliam holtzmannLiang fuXiaoyu liu