University of Massachusetts Amherst: Researchers Simplify Purification of Complex Entangled Quantum States

Graph states underpin several quantum technologies, including measurement-based quantum computation and quantum networks. Achieving systematic entanglement distillation for these states presents a key challenge due to the rapidly expanding circuit complexity with increasing parties. Mingyuan Wang and colleagues at University of Massachusetts Amherst, University of Siegen and Manning College of Information and Computer Sciences demonstrate a new set of “factorized graph-preserving” Clifford operations that efficiently enumerate and optimise graph-state purification circuits for current noisy quantum hardware. By representing these operations as permutations of graph-basis labels and using a compact factorized description, the team sharply reduce computational complexity during…