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Code source de qiskit.opflow.evolutions.evolution_base

# This code is part of Qiskit.
#
# (C) Copyright IBM 2020.
#
# 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.

""" EvolutionBase Class """

from abc import ABC, abstractmethod

from qiskit.opflow.operator_base import OperatorBase
from qiskit.opflow.converters.converter_base import ConverterBase


[docs]class EvolutionBase(ConverterBase, ABC): r""" A base for Evolution converters. Evolutions are converters which traverse an Operator tree, replacing any ``EvolvedOp`` `e` with a Schrodinger equation-style evolution ``CircuitOp`` equalling or approximating the matrix exponential of -i * the Operator contained inside (`e.primitive`). The Evolutions are essentially implementations of Hamiltonian Simulation algorithms, including various methods for Trotterization. """
[docs] @abstractmethod def convert(self, operator: OperatorBase) -> OperatorBase: """Traverse the operator, replacing any ``EvolutionOps`` with their equivalent evolution ``CircuitOps``. Args: operator: The Operator to convert. Returns: The converted Operator, with ``EvolutionOps`` replaced by ``CircuitOps``. """ raise NotImplementedError
# TODO @abstractmethod # def error_bounds(self): # """ error bounds """ # raise NotImplementedError