Dramatically decreasing overhead and errors in quantum computers

https://www.eurekalert.org/news-releases/1088224

"single high-fidelity quantum state prepared from many noisy ones, but computationally expensive requiring many qubits... overcome using level-zero version of this distillation, in which a fault-tolerant circuit is developed at the physical qubit or zeroth level as opposed to higher, more abstract levels. In addition to requiring far fewer qubits, this new method led to a roughly several dozen times decrease in spatial and temporal overhead compared with that of the traditional version in numerical simulations"