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# This code is part of Qiskit.
#
# (C) Copyright IBM 2021, 2022.
#
# 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
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.
"""Class for holding evolution result."""
from __future__ import annotations
from qiskit import QuantumCircuit
from qiskit.algorithms.list_or_dict import ListOrDict
from qiskit.opflow import StateFn, OperatorBase
from qiskit.utils.deprecation import deprecate_func
from ..algorithm_result import AlgorithmResult
class EvolutionResult(AlgorithmResult):
"""Deprecated: Class for holding evolution result.
The EvolutionResult class has been superseded by the
:class:`qiskit.algorithms.time_evolvers.TimeEvolutionResult` class.
This class will be deprecated in a future release and subsequently
removed after that.
"""
@deprecate_func(
additional_msg=(
"Instead, use the class ``qiskit.algorithms.time_evolvers.TimeEvolutionResult``. "
"See https://qisk.it/algo_migration for a migration guide."
),
since="0.24.0",
)
def __init__(
self,
evolved_state: StateFn | QuantumCircuit | OperatorBase,
aux_ops_evaluated: ListOrDict[tuple[complex, complex]] | None = None,
):
"""
Args:
evolved_state: An evolved quantum state.
aux_ops_evaluated: Optional list of observables for which expected values on an evolved
state are calculated. These values are in fact tuples formatted as (mean, standard
deviation).
"""
self.evolved_state = evolved_state
self.aux_ops_evaluated = aux_ops_evaluated
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