# Copyright 2018 The Cirq 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 cirq import ops, circuits, devices
[docs]def nonoptimal_toffoli_circuit(
q0: ops.QubitId, q1: ops.QubitId, q2: ops.QubitId,
device: devices.Device = devices.UnconstrainedDevice
) -> circuits.Circuit:
return circuits.Circuit.from_ops(
ops.Y(q2) ** 0.5,
ops.X(q2),
ops.CNOT(q1, q2),
ops.Z(q2) ** -0.25,
ops.CNOT(q1, q2),
ops.CNOT(q2, q1),
ops.CNOT(q1, q2),
ops.CNOT(q0, q1),
ops.CNOT(q1, q2),
ops.CNOT(q2, q1),
ops.CNOT(q1, q2),
ops.Z(q2) ** 0.25,
ops.CNOT(q1, q2),
ops.Z(q2) ** -0.25,
ops.CNOT(q1, q2),
ops.CNOT(q2, q1),
ops.CNOT(q1, q2),
ops.CNOT(q0, q1),
ops.CNOT(q1, q2),
ops.CNOT(q2, q1),
ops.CNOT(q1, q2),
ops.Z(q2) ** 0.25,
ops.Z(q1) ** 0.25,
ops.CNOT(q0, q1),
ops.Z(q0) ** 0.25,
ops.Z(q1) ** -0.25,
ops.CNOT(q0, q1),
ops.Y(q2) ** 0.5,
ops.X(q2),
device=device
)