# Copyright 2019 The PECOS Developers
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
# the License.You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.

from pecos.simulators.parent_sim_classes import Simulator


class PauliPropagation(Simulator):
    """Base class for Pauli-propagation simulators."""

    def __init__(self) -> None:
        super().__init__()


class Stabilizer(Simulator):
    """Base class for stabilizer simulators."""

    def __init__(self) -> None:
        super().__init__()


class StateVector(Simulator):
    """Base class for state-vector simulators."""

    def __init__(self) -> None:
        super().__init__()


class DensityMatrix(Simulator):
    """Base class for density-matrix simulators."""

    def __init__(self) -> None:
        super().__init__()


class ProcessMatrix(Simulator):
    """Base class for process-matrix simulators."""

    def __init__(self) -> None:
        super().__init__()
