I found (page 33) the method of finding fidelity from fit by "interleaved and reference decay" according to the sequence fidelity formula: $$F_{ref}=Ap_{ref}^{m}+B,$$ where $p_{ref}^{m}$ is sequence decay.

But if we look at the following datasets:


we can find that the reference sequence fidelity curve is close to $1$ and the other curves corresponding to the gates - around $0.998-0.999$ (which corresponds to decay $p_{gate}$).

How could it be that the difference between interleaved and reference decays is around $0.999$?

  • $\begingroup$ Can I extract fidelity from gate error: $r_{gate}=(1-p_{gate}/p_{ref})(d-1)/d$ with $d=2^n$ and fidelity will be 1-$r_{gate}$? $\endgroup$
    – Curious
    Oct 14, 2021 at 9:21


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