AttributeError: 'QuantumCircuit' object has no attribute '_parameter_table'

[RunawayFancy]

Informations

• Qiskit Experiments version: 0.7.0
• Python version: 3.10.10
• Operating system: Windows

What is the current behavior?

I set up a now environment with qiskit, qiskit-experiment and want to run the 1Q RB code. The import is godd, but the expdata1 = exp1.run(backend).block_for_results() raise up an AttributeError:

Code

import numpy as np
from qiskit_experiments.library import StandardRB, InterleavedRB
from qiskit_experiments.framework import ParallelExperiment, BatchExperiment
import qiskit.circuit.library as circuits

# For simulation
from qiskit_aer import AerSimulator
from qiskit_ibm_runtime.fake_provider import FakePerth

backend = AerSimulator.from_backend(FakePerth())

lengths = np.arange(1, 800, 200)
num_samples = 10
seed = 1010
qubits = [0]

# Run an RB experiment on qubit 0
exp1 = StandardRB(qubits, lengths, num_samples=num_samples, seed=seed)
expdata1 = exp1.run(backend).block_for_results()
results1 = expdata1.analysis_results()

# View result data
print("Gate error ratio: %s" % expdata1.experiment.analysis.options.gate_error_ratio)
display(expdata1.figure(0))
for result in results1:
    print(result)

Errors

{
	"name": "AttributeError",
	"message": "'QuantumCircuit' object has no attribute '_parameter_table'",
	"stack": "---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In[2], line 8
      6 # Run an RB experiment on qubit 0
      7 exp1 = StandardRB(qubits, lengths, num_samples=num_samples, seed=seed)
----> 8 expdata1 = exp1.run(backend).block_for_results()
      9 results1 = expdata1.analysis_results()
     11 # View result data

File e:\\conda\\envs\\qiskit_prac\\lib\\site-packages\\qiskit_experiments\\framework\\base_experiment.py:245, in BaseExperiment.run(self, backend, analysis, timeout, **run_options)
    242 experiment._finalize()
    244 # Generate and transpile circuits
--> 245 transpiled_circuits = experiment._transpiled_circuits()
    247 # Initialize result container
    248 experiment_data = experiment._initialize_experiment_data()

File e:\\conda\\envs\\qiskit_prac\\lib\\site-packages\\qiskit_experiments\\library\\randomized_benchmarking\\standard_rb.py:381, in StandardRB._transpiled_circuits(self)
    379     transpiled = super()._transpiled_circuits()
    380 else:
--> 381     transpiled = [
    382         _transpile_clifford_circuit(circ, physical_qubits=self.physical_qubits)
    383         for circ in self.circuits()
    384     ]
    385     # Set custom calibrations provided in backend (excluding simulators)
    386     if isinstance(self.backend, BackendV2) and \"simulator\" not in self.backend.name:

File e:\\conda\\envs\\qiskit_prac\\lib\\site-packages\\qiskit_experiments\\library\\randomized_benchmarking\\standard_rb.py:382, in <listcomp>(.0)
    379     transpiled = super()._transpiled_circuits()
    380 else:
    381     transpiled = [
--> 382         _transpile_clifford_circuit(circ, physical_qubits=self.physical_qubits)
    383         for circ in self.circuits()
    384     ]
    385     # Set custom calibrations provided in backend (excluding simulators)
    386     if isinstance(self.backend, BackendV2) and \"simulator\" not in self.backend.name:

File e:\\conda\\envs\\qiskit_prac\\lib\\site-packages\\qiskit_experiments\\library\\randomized_benchmarking\\clifford_utils.py:55, in _transpile_clifford_circuit(circuit, physical_qubits)
     51 def _transpile_clifford_circuit(
     52     circuit: QuantumCircuit, physical_qubits: Sequence[int]
     53 ) -> QuantumCircuit:
     54     # Simplified transpile that only decomposes Clifford circuits and creates the layout.
---> 55     return _apply_qubit_layout(_decompose_clifford_ops(circuit), physical_qubits=physical_qubits)

File e:\\conda\\envs\\qiskit_prac\\lib\\site-packages\\qiskit_experiments\\library\\randomized_benchmarking\\clifford_utils.py:64, in _decompose_clifford_ops(circuit)
     58 def _decompose_clifford_ops(circuit: QuantumCircuit) -> QuantumCircuit:
     59     # Simplified QuantumCircuit.decompose, which decomposes only Clifford ops
     60     # Note that the resulting circuit depends on the input circuit,
     61     # that means the changes on the input circuit may affect the resulting circuit.
     62     # For example, the resulting circuit shares the parameter_table of the input circuit,
     63     res = circuit.copy_empty_like()
---> 64     res._parameter_table = circuit._parameter_table
     65     for inst in circuit:
     66         if inst.operation.name.startswith(\"Clifford\"):  # Decompose

AttributeError: 'QuantumCircuit' object has no attribute '_parameter_table'"
}

Steps to reproduce the problem

With the same environment, run

import numpy as np
from qiskit_experiments.library import StandardRB, InterleavedRB
from qiskit_experiments.framework import ParallelExperiment, BatchExperiment
import qiskit.circuit.library as circuits

# For simulation
from qiskit_aer import AerSimulator
from qiskit_ibm_runtime.fake_provider import FakePerth

backend = AerSimulator.from_backend(FakePerth())

lengths = np.arange(1, 800, 200)
num_samples = 10
seed = 1010
qubits = [0]

# Run an RB experiment on qubit 0
exp1 = StandardRB(qubits, lengths, num_samples=num_samples, seed=seed)
expdata1 = exp1.run(backend).block_for_results()
results1 = expdata1.analysis_results()

# View result data
print("Gate error ratio: %s" % expdata1.experiment.analysis.options.gate_error_ratio)
display(expdata1.figure(0))
for result in results1:
    print(result)

What is the expected behavior?

Same as https://qiskit-community.github.io/qiskit-experiments/manuals/verification/randomized_benchmarking.html shows.

Suggested solutions

No idea.

Appendix I: All packages

annotated-types==0.7.0
argon2-cffi==21.3.0
arraylias==0.1.1
asteval==1.0.2
asttokens==2.4.1
certifi==2024.8.30
cffi==1.17.0
charset-normalizer==3.3.2
clarabel==0.9.0
colorama==0.4.6
comm @ file:///home/conda/feedstock_root/build_artifacts/comm_1710320294760/work
contourpy==1.3.0
cryptography==43.0.1
cvxpy==1.5.3
cycler==0.12.1
debugpy @ file:///D:/bld/debugpy_1725269264841/work
decorator==5.1.1
dill==0.3.8
ecos==2.0.14
exceptiongroup==1.2.0
executing==2.0.1
fonttools==4.53.1
ibm-cloud-sdk-core==3.20.6
ibm-platform-services==0.56.0
idna==3.8
importlib_metadata @ file:///home/conda/feedstock_root/build_artifacts/importlib-metadata_1724187233579/work
ipykernel @ file:///D:/bld/ipykernel_1719845595208/work
ipython @ file:///D:/bld/ipython_1725050320818/work
ipywidgets==7.6.5
isoduration==20.11.0
jedi==0.19.1
joblib==1.4.2
jupyter==1.0.0
jupyter-lsp==2.2.0
jupyter_client @ file:///home/conda/feedstock_root/build_artifacts/jupyter_client_1716472197302/work
jupyter_core @ file:///D:/bld/jupyter_core_1710257272359/work
jupyter_server_terminals==0.4.4
kiwisolver==1.4.6
lmfit==1.3.2
matplotlib==3.9.2
matplotlib-inline==0.1.6
mpmath==1.3.0
multiset==3.2.0
nest_asyncio @ file:///home/conda/feedstock_root/build_artifacts/nest-asyncio_1705850609492/work
notebook_shim==0.2.3
numpy==2.1.1
osqp==0.6.7.post1
packaging==24.0
pandas==2.2.2
parso==0.8.3
pbr==6.1.0
pickleshare @ file:///home/conda/feedstock_root/build_artifacts/pickleshare_1602536217715/work
pillow==10.4.0
platformdirs @ file:///home/conda/feedstock_root/build_artifacts/platformdirs_1715777629804/work
prompt-toolkit==3.0.43
psutil @ file:///D:/bld/psutil_1719274706785/work
pure-eval==0.2.2
pycparser==2.22
pydantic==2.8.2
pydantic_core==2.20.1
pydot==3.0.1
Pygments==2.17.2
PyJWT==2.9.0
pylatexenc==2.10
pyparsing==3.1.4
pyspnego==0.11.1
python-dateutil==2.9.0.post0
pytz==2024.1
pywin32==306
PyYAML==6.0.2
pyzmq==25.1.2
qdldl==0.1.7.post4
qiskit==1.2.0
qiskit-aer==0.15.0
qiskit-dynamics==0.5.1
qiskit-experiments==0.7.0
qiskit-ibm-experiment==0.4.7
qiskit-ibm-runtime==0.28.0
requests==2.32.3
requests_ntlm==1.3.0
rustworkx==0.15.1
scikit-learn==1.5.1
scipy==1.14.1
scs==3.2.7
seaborn==0.13.2
six==1.16.0
sspilib==0.1.0
stack-data==0.6.3
stevedore==5.3.0
symengine==0.11.0
sympy==1.13.2
threadpoolctl==3.5.0
tornado==6.4
traitlets @ file:///home/conda/feedstock_root/build_artifacts/traitlets_1713535121073/work
typing_extensions @ file:///home/conda/feedstock_root/build_artifacts/typing_extensions_1717802530399/work
tzdata==2024.1
uncertainties==3.2.2
urllib3==2.2.2
wcwidth @ file:///home/conda/feedstock_root/build_artifacts/wcwidth_1704731205417/work
websocket-client==1.8.0
widgetsnbextension==3.5.2
zipp @ file:///home/conda/feedstock_root/build_artifacts/zipp_1724730934107/work

[yaelbh]

I think it was fixed in #1465 (probably not released yet).

[RunawayFancy]

Thank you, that's helpful.