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I think this is the SOTA

https://s7d9.scene7.com/is/content/quantum/LQ_ErrorCorrectio...

the corrections significantly decrease the error rate but they need to do a lot of preselection, so it isn't quite useful yet.




Thanks! If I'm reading that correctly, their best error rate with pre and post selection is 0.03%, but they end the paper with the statement "A significant milestone will be to demonstrate a universal family of quantum circuits with logical error rates approaching 10^−8." Seems like we're still six orders of magnitude off.


IIRC We're just over 1 order of magnitude on the physical qbit error before we should see the exponential gains from error correction that theory predicts.




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