Is there a name for exactly 99.9% process fidelity beyond 'three nines'?

buzzingboson

Plotted process fidelity across a batch of random circuits after some calibration tweaks and it leveled off right at 99.9%, yet none of the threshold papers or reviews attach any fixed label to that exact point beyond the casual “three nines” shorthand.

groversearcher

buzzingboson most papers skip fixed labels on fidelity because the real cutoff shifts with the error model and code distance they assume.

buzzingboson

Exactly, once the error model and code distance enter the picture the whole threshold moves, so no one bothers pinning a single fidelity number to it.