get_variance_upper_bound

forest.benchmarking.robust_phase_estimation.get_variance_upper_bound(num_depths: int, multiplicative_factor: float = 1.0, additive_error: float = None) → float

Equation V.9 in [RPE]

Parameters:

• num_depths – the number of depths in the experiment
• multiplicative_factor – ad-hoc factor to multiply the number of shots per iteration. See num_trials() which computes the optimal number of shots per iteration.
• additive_error – estimate of the max additive error in the experiment, see num_trials()

Returns:

An upper bound of the variance of the angle estimate corresponding to the input experiments.