Observable Measurement - 3.5 - Readout Correction #3649
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balopat
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Jan 15, 2021
…timation-x-readout-corr
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Jan 20, 2021
| f = a / b | ||
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| # assume cov(a,b) = 0, otherwise there would be another term. | ||
| var = f ** 2 * (var_a / (a ** 2) + var_b / (b ** 2)) |
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can you add a reference or derivation for this formula?
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This is part 3.5 or 4.5 of #2781
It comes either before or after #3647
This extends the vanilla
BitstringAccumulatorto handle readout calibrations which can be used to correct observables and mitigate the effect of readout error. However, users should probably never use this functionality directly; instead passing the appropriate configuration options to the functions defined in #3647. It would make git dependencies if this is merged first.More sophisticated readout mitigation schemes would be implemented by subclassing
BitstringAccumulator. Subclasses would (1) modify the constructor to accept the relevant calibration info, if different than this simple scheme and (2) modify themean()andvariance()functions to correct those quantities using the new scheme.