New approach to circuit compression could deliver real-world quantum computers years ahead of schedule

EurekAlert  November 12, 2020
“Quantum advantage” has been achieved in Noisy Intermediate-Scale Quantum (NISQ) devices in early proof-of-principle experiments. But the NISQ devices are still prone to lots of errors that accumulate during their operation. To negate the need for millions of physical qubits for a fault-tolerant computer researchers in Japan proposed the use of the ZX-calculus as an intermediate language for braided circuit compression in large-scale fault-tolerant quantum computers. According to the researchers by compressing quantum circuits, they could reduce the size of the quantum computer and its runtime, which in turn lessens the requirement for error protection…read more. TECHNICAL ARTICLE