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Remove use of opflow in Estimator #1996

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Nov 14, 2023
Merged

Remove use of opflow in Estimator #1996

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5 changes: 2 additions & 3 deletions qiskit_aer/primitives/estimator.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# This code is part of Qiskit.
#
# (C) Copyright IBM 2022.
# (C) Copyright IBM 2022, 2023.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
Expand All @@ -23,7 +23,6 @@
import numpy as np
from qiskit.circuit import ParameterExpression, QuantumCircuit
from qiskit.compiler import transpile
from qiskit.opflow import PauliSumOp
from qiskit.primitives import BaseEstimator, EstimatorResult
from qiskit.primitives.primitive_job import PrimitiveJob
from qiskit.primitives.utils import _circuit_key, _observable_key, init_observable
Expand Down Expand Up @@ -174,7 +173,7 @@ def _call(
def _run(
self,
circuits: Sequence[QuantumCircuit],
observables: Sequence[BaseOperator | PauliSumOp],
observables: Sequence[BaseOperator],
parameter_values: Sequence[Sequence[float]],
**run_options,
) -> PrimitiveJob:
Expand Down
8 changes: 8 additions & 0 deletions releasenotes/notes/remove-opflow-estimator-a3b64cfe8a4fd6b3.yaml
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@@ -0,0 +1,8 @@
---
upgrade:
- |
The :meth:`qiskit_aer.primitives.Estimator.run` method no longer supports
``observables`` input arguments of type ``PauliSumOp``. The ``PauliSumOp``
class was deprecated in Qiskit 0.44 and will be removed in Qiskit 1.0.
Alternative types that you can use instead of ``PauliSumOp`` are
:class:`qiskit.quantum_info.SparsePauliOp` or :class:`qiskit.quantum_info.Pauli`.
16 changes: 1 addition & 15 deletions test/terra/primitives/test_estimator.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# This code is part of Qiskit.
#
# (C) Copyright IBM 2022.
# (C) Copyright IBM 2022, 2023.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
Expand All @@ -23,7 +23,6 @@
from qiskit.circuit import Parameter, QuantumCircuit
from qiskit.circuit.library import RealAmplitudes
from qiskit.exceptions import QiskitError
from qiskit.opflow import PauliSumOp
from qiskit.primitives import EstimatorResult
from qiskit.quantum_info import Operator, SparsePauliOp

Expand Down Expand Up @@ -53,19 +52,6 @@ def setUp(self):
def test_estimator(self, abelian_grouping):
"""test for a simple use case"""
lst = [("XX", 1), ("YY", 2), ("ZZ", 3)]
with self.assertWarns(DeprecationWarning):
with self.subTest("PauliSumOp"):
observable = PauliSumOp.from_list(lst)
ansatz = RealAmplitudes(num_qubits=2, reps=2)
est = Estimator(
backend_options={"method": "statevector"}, abelian_grouping=abelian_grouping
)
result = est.run(
ansatz, observable, parameter_values=[[0, 1, 1, 2, 3, 5]], seed=15
).result()
self.assertIsInstance(result, EstimatorResult)
np.testing.assert_allclose(result.values, [1.728515625])

with self.subTest("SparsePauliOp"):
observable = SparsePauliOp.from_list(lst)
ansatz = RealAmplitudes(num_qubits=2, reps=2)
Expand Down