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modified reps for ZZFeatureMap object created, to fit printed circuit (#8333) 

* modified reps for ZZFeatureMap object created, to fit printed circuit

* updated the output of classifier.parameters for Example 2
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Colin Hong 2022-07-13 22:59:29 +08:00 committed by GitHub
parent 81abc384e4
commit 400fadf70e
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1 changed files with 19 additions and 5 deletions
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24
qiskit/circuit/library/data_preparation/zz_feature_map.py
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@ -37,7 +37,8 @@ class ZZFeatureMap(PauliFeatureMap):
Examples:
>>> prep = ZZFeatureMap(2, reps=2)
>>> from qiskit.circuit.library import ZZFeatureMap
>>> prep = ZZFeatureMap(2, reps=1)
>>> print(prep)
┌───┐┌──────────────┐
q_0: ┤ H ├┤ U1(2.0*x[0]) ├──■───────────────────────────────────────■──
@ -50,11 +51,24 @@ class ZZFeatureMap(PauliFeatureMap):
>>> classifier.num_parameters
15
>>> classifier.parameters # 'x' for the data preparation, 'θ' for the SU2 parameters
{Parameter(θ[9]), Parameter(θ[4]), Parameter(θ[6]), Parameter(θ[1]), Parameter(x[2]),
Parameter(θ[7]), Parameter(x[1]), Parameter(θ[8]), Parameter(θ[2]), Parameter(θ[10]),
Parameter(θ[5]), Parameter(θ[0]), Parameter(θ[3]), Parameter(x[0]), Parameter(θ[11])}
ParameterView([
ParameterVectorElement(x[0]), ParameterVectorElement(x[1]),
ParameterVectorElement(x[2]), ParameterVectorElement(θ[0]),
ParameterVectorElement(θ[1]), ParameterVectorElement(θ[2]),
ParameterVectorElement(θ[3]), ParameterVectorElement(θ[4]),
ParameterVectorElement(θ[5]), ParameterVectorElement(θ[6]),
ParameterVectorElement(θ[7]), ParameterVectorElement(θ[8]),
ParameterVectorElement(θ[9]), ParameterVectorElement(θ[10]),
ParameterVectorElement(θ[11]), ParameterVectorElement(θ[12]),
ParameterVectorElement(θ[13]), ParameterVectorElement(θ[14]),
ParameterVectorElement(θ[15]), ParameterVectorElement(θ[16]),
ParameterVectorElement(θ[17]), ParameterVectorElement(θ[18]),
ParameterVectorElement(θ[19]), ParameterVectorElement(θ[20]),
ParameterVectorElement(θ[21]), ParameterVectorElement(θ[22]),
ParameterVectorElement(θ[23])
])
>>> classifier.count_ops()
OrderedDict([('u1', 12), ('cx', 12), ('ry', 12), ('cz', 9), ('h', 6)])
OrderedDict([('ZZFeatureMap', 1), ('EfficientSU2', 1)])
"""
def __init__(