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removed debug code
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zero_noise_extrapolation_cnot.py

Lines changed: 5 additions & 67 deletions
Original file line numberDiff line numberDiff line change
@@ -77,6 +77,10 @@ def noise_amplified_variances(self) -> ndarray:
7777
def shots(self) -> ndarray:
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return asarray([result.shots for result in self.noise_amplified_results])
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80+
@property
81+
def total_shots(self) -> float:
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return sum(result.shots for result in self.noise_amplified_results)
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@property
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def depths(self) -> ndarray:
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return asarray([result.qc.depth() for result in self.noise_amplified_results])
@@ -414,7 +418,7 @@ def write_to_file(self, filename: str, data):
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# Functions for processing and executing the quantum circuits
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def noise_amplify_and_pauli_twirl_cnots(self, qc: QuantumCircuit, amp_factor: int,
417-
pauli_twirl: bool) -> QuantumCircuit:
421+
pauli_twirl: bool = False) -> QuantumCircuit:
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"""
419423
Amplify CNOT-noise by extending each CNOT-gate as CNOT^amp_factor and possibly Pauli-twirl all CNOT-gates
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@@ -1066,69 +1070,3 @@ def noise_amplify_cnots(qc: QuantumCircuit, amp_factor: int):
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10671071
return new_qc
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1069-
if __name__ == "__main__":
1070-
def swaptest_exp_val_func(results, myfilter=None):
1071-
exp_vals, variances = zeros(shape(results)), zeros(shape(results))
1072-
for i, experiment_result in enumerate(results):
1073-
shots = experiment_result.shots
1074-
counts = experiment_result.data.counts
1075-
eigenval = 0
1076-
esquared = 0
1077-
for key in counts.keys():
1078-
if key == "0x0":
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eigenval = +1
1080-
elif key == "0x1":
1081-
eigenval = -1
1082-
exp_vals[i] += eigenval * counts[key] / shots
1083-
esquared += counts[key] / shots
1084-
variances[i] = 1 - exp_vals[i]**2
1085-
return exp_vals, variances
1086-
1087-
def add_swaptest_gate(qc, probe, q1, q2, barrier=False):
1088-
qc.toffoli(probe, q1, q2)
1089-
1090-
if barrier:
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qc.barrier()
1092-
1093-
qc.toffoli(probe, q2, q1)
1094-
1095-
if barrier:
1096-
qc.barrier()
1097-
1098-
qc.toffoli(probe, q1, q2)
1099-
1100-
1101-
def create_3qswaptest_circuit(barrier=False):
1102-
qc = QuantumCircuit(3, 1)
1103-
1104-
qc.h(0)
1105-
1106-
qc.h(1)
1107-
1108-
if barrier:
1109-
qc.barrier()
1110-
1111-
add_swaptest_gate(qc, 0, 1, 2, barrier=barrier)
1112-
1113-
if barrier:
1114-
qc.barrier()
1115-
1116-
qc.h(0)
1117-
1118-
qc.measure(0, 0)
1119-
1120-
return qc
1121-
1122-
qc = create_3qswaptest_circuit()
1123-
1124-
from qiskit.test.mock import FakeAthens
1125-
1126-
mock = FakeAthens()
1127-
1128-
zne = ZeroNoiseExtrapolation(qc=qc, exp_val_func=swaptest_exp_val_func, backend=mock,
1129-
n_amp_factors=3, shots=10*8192,
1130-
error_controlled_sampling=True, error_tol=0.01, max_shots=100*8192)
1131-
1132-
print(zne.mitigate(verbose=True))
1133-
1134-
#print(zne.result)

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