Relation between MeasurementResult and the circuit conditions that originated it

[EmilianoG-byte]

Hi!

In the Execute class the method _call_executor stores the results and the circuits run in the variables _quantum_results and _executed_circuits, respectively. However, this does not provide information of what "conditions" was each circuit run under, right? For instance, what method was used to amplify the noise, what noise scale, etc.

Is this correct? Or am I missing that this information can be accessed in a different way?

[andreamari]

Hi @EmilianoG-byte,
correct. There is no log of mitigation methods or similar hyper-parameters in Executor objects or in MeasurementResult objects.

Hint: If you are using ZNE, you can deduce the noise scale factor associated to a specific circuit $C_j$ in _executed_circuits by evaluating the number $n_j$ of gates in $C_j$ and comparing it to the number of gates of the unmitigated circuit $n_{unmitigated}$. The scale factor is approximately given by ${\lambda }_j=n_j/n_{unmitigated}$.

Note also that, by default, Mitiq uses scale_factors = [1, 2, 3] and fold_gates_at_random as a noise scaling method.

[EmilianoG-byte]

I see, thank you!