# Copyright (C) 2023 qBraid
#
# This file is part of the qBraid-SDK
#
# The qBraid-SDK is free software released under the GNU General Public License v3
# or later. You can redistribute and/or modify it under the terms of the GPL v3.
# See the LICENSE file in the project root or <https://www.gnu.org/licenses/gpl-3.0.html>.
#
# THERE IS NO WARRANTY for the qBraid-SDK, as per Section 15 of the GPL v3.
"""
Module for converting generic quantum circuits to basis gate set compatible with IonQ devices.
"""
from typing import Union
import pytket
import pytket.extensions.braket
from braket.circuits import Circuit
try:
# pytket >= 1.22
from pytket.circuit_library import TK1_to_RzRx # type: ignore
except (ModuleNotFoundError, ImportError): # prama: no cover
try:
# pytket >1.18,<1.22
from pytket.circuit_library import _TK1_to_RzRx as TK1_to_RzRx # type: ignore
except (ModuleNotFoundError, ImportError):
# pytket <= 1.18
from pytket._tket.circuit._library import _TK1_to_RzRx as TK1_to_RzRx # type: ignore
from pytket.passes import RebaseCustom
from pytket.predicates import (
CompilationUnit,
GateSetPredicate,
MaxNQubitsPredicate,
NoClassicalControlPredicate,
NoFastFeedforwardPredicate,
NoMidMeasurePredicate,
NoSymbolsPredicate,
)
from qbraid.compiler.exceptions import CompilerError
HARMONY_MAX_QUBITS = 11
ionq_gates = {
pytket.circuit.OpType.X,
pytket.circuit.OpType.Y,
pytket.circuit.OpType.Z,
pytket.circuit.OpType.Rx,
pytket.circuit.OpType.Ry,
pytket.circuit.OpType.Rz,
pytket.circuit.OpType.H,
pytket.circuit.OpType.S,
pytket.circuit.OpType.Sdg,
pytket.circuit.OpType.T,
pytket.circuit.OpType.Tdg,
pytket.circuit.OpType.V,
pytket.circuit.OpType.Vdg,
pytket.circuit.OpType.Measure,
pytket.circuit.OpType.noop,
pytket.circuit.OpType.SWAP,
pytket.circuit.OpType.CX,
pytket.circuit.OpType.ZZPhase,
pytket.circuit.OpType.XXPhase,
pytket.circuit.OpType.YYPhase,
pytket.circuit.OpType.ZZMax,
pytket.circuit.OpType.Barrier,
}
preds = [
NoClassicalControlPredicate(),
NoFastFeedforwardPredicate(),
NoMidMeasurePredicate(),
NoSymbolsPredicate(),
GateSetPredicate(ionq_gates),
MaxNQubitsPredicate(HARMONY_MAX_QUBITS),
]
ionq_rebase_pass = RebaseCustom(
ionq_gates,
pytket.Circuit(), # cx_replacement (irrelevant)
TK1_to_RzRx,
) # tk1_replacement
[docs]
def braket_ionq_compile(circuit: Union[Circuit, pytket.circuit.Circuit]) -> Circuit:
"""
Compiles a Braket circuit to a Braket circuit that can run on IonQ Harmony.
Args:
circuit (Union[braket.circuits.Circuit, pytket.circuit.Circuit]):
The input Braket or PyTKET circuit to be compiled.
Returns:
braket.circuits.Circuit: The compiled Braket circuit that can run on IonQ Harmony.
Notes:
- If the input circuit is a braket Circuit, the function
transpiles it to a ``pytket.circuit.Circuit`` before compilation.
- The circuit is transpiled using qBraid's transpiler, if it contains
any of the following gates::
CPhaseShift00
CPhaseShift01
CPhaseShift10
CV
ECR
GPi
GPi2
MS
PSwap
Unitary
- Otherwise, the circuit is transpiled using ``pytket-braket``'s ``braket_to_tk``.
"""
if isinstance(circuit, Circuit):
try:
tk_circuit = pytket.extensions.braket.braket_convert.braket_to_tk(circuit)
except NotImplementedError:
from qbraid import circuit_wrapper # pylint: disable=import-outside-toplevel
tk_circuit = circuit_wrapper(circuit).transpile("pytket")
else:
tk_circuit = circuit
cu = CompilationUnit(tk_circuit, preds)
ionq_rebase_pass.apply(cu)
if not cu.check_all_predicates():
raise CompilerError("Circuit cannot be compiled to IonQ Harmony.")
compiled, _, _ = pytket.extensions.braket.braket_convert.tk_to_braket(cu.circuit)
return compiled