circuit_knitting.utils.metrics.HOP

HOP(target, obs)[source]

Compute the Heavy Output Probability (HOP).

The HOP is an important metric for quantum volume experiments and is defined at the probability that one measures a bitstring above the median target probability.

Deprecated since version 0.7.0: The function circuit_knitting.utils.metrics.HOP() is deprecated as of circuit-knitting-toolbox 0.7.0. It will be removed no sooner than CKT v0.8.0.

Example: >>> HOP(np.array([0.1, 0.1, 0.3, 0.5]), np.array([0.25, 0.25, 0.25, 0.25])) 0.5

Parameters:

  • target – The target feature vector

  • obs – The actually observed feature vector

Returns:

The computed HOP