# Copyright 2025 qBraid
#
# 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
#
# http://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.
"""
Module containing PennyLane conversion extras.
"""
from __future__ import annotations
from typing import TYPE_CHECKING
from qbraid.transpiler.annotations import requires_extras
if TYPE_CHECKING:
import braket.circuits
import cirq
import pennylane.tape
import qiskit.circuit
[docs]
@requires_extras("pennylane_qiskit")
def pennylane_to_qiskit(tape: pennylane.tape.QuantumTape) -> qiskit.circuit.QuantumCircuit:
"""Returns a Qiskit QuantumCircuit equivalent to the input PennyLane tape.
Args:
tape (pennylane.tape.QuantumTape): PennyLane tape to convert to a Qiskit circuit.
Returns:
qiskit.circuit.QuantumCircuit: Qiskit circuit equivalent to input PennyLane tape.
"""
# pylint: disable-next=import-outside-toplevel
from pennylane_qiskit.converter import circuit_to_qiskit
return circuit_to_qiskit(tape, len(tape.wires), diagonalize=False, measure=False)
[docs]
@requires_extras("braket.pennylane_plugin")
def pennylane_to_braket(tape: pennylane.tape.QuantumTape) -> braket.circuits.Circuit:
"""Returns an Amazon Braket circuit equivalent to the input PennyLane tape.
Args:
tape (pennylane.tape.QuantumTape): PennyLane tape to convert to a Braket circuit.
Returns:
braket.circuits.Circuit: Braket circuit equivalent to input PennyLane tape.
"""
# pylint: disable-next=import-outside-toplevel
from braket.circuits import Circuit, Instruction, Qubit
# pylint: disable-next=import-outside-toplevel
from braket.pennylane_plugin.translation import translate_operation
circuit = Circuit()
for op in tape.operations:
braket_gate = translate_operation(op)
qubits = [Qubit(int(w)) for w in op.wires]
circuit.add_instruction(Instruction(braket_gate, qubits))
return circuit
[docs]
@requires_extras("pennylane_cirq")
def pennylane_to_cirq(tape: pennylane.tape.QuantumTape) -> cirq.Circuit:
"""Returns a Cirq circuit equivalent to the input PennyLane tape.
Args:
tape (pennylane.tape.QuantumTape): PennyLane tape to convert to a Cirq circuit.
Returns:
cirq.Circuit: Cirq circuit equivalent to input PennyLane tape.
"""
import pennylane_cirq # pylint: disable=import-outside-toplevel
dev = pennylane_cirq.SimulatorDevice(wires=range(len(tape.wires)))
dev.reset()
dev.apply(tape.operations)
return dev.circuit