We simulate the performance of toplogical error-correcting codes when all the encoding qubits share same non-Markovian bath. We find that scalable and reliable quantum computing may still be possible if error-rates decline as $\sqrt{n}$ where $n$ is the codeword size.

How to experimentally show that a quantum gate protected by a fully error-corrected code (e.g. [[7,1,3]] has higher fidelity than that of its physical counterpart, without encoded state-preparation. The experimental results are based on IBMQ device ibmq_melbourne.

How to correct quantum errors without encoding and parity checks? what forms of real-life quantum noise can actually be reversed on the run-time? and how can we engineer more noise-robust quantum circuits? learn more on these new findings in this PRA research article.