Sorry for the previous mail sent before editing. Joseph Touch wrote:
Noise isn’t the only focal point of skepticism; at least one other is full-entanglement scale, which has essentially remained static for decades (8-way recently leaping to 10-way).
It was considered that, once certain accuracy is obtained, recursive application of quantum error correction can increase the scale. But, it is based on wrong assumption that entangled states are just as noisy/fragile as unentangled ones, though each unentangled term consisting an entangled state is disturbed by noise independently, which makes the state a lot more noisy/fragile than unentangled ones. Masataka Ohta
