microsoft/qdk
Publicmirrored from https://github.com/microsoft/qdkAvailable
source/pip/qsharp/interop/qiskit/backends/neutral_atom_target.py
44lines · modecode
| 1 | # Copyright (c) Microsoft Corporation. |
| 2 | # Licensed under the MIT License. |
| 3 | |
| 4 | import logging |
| 5 | |
| 6 | from qiskit.circuit import Measure, Parameter, Reset |
| 7 | from qiskit.circuit.library.standard_gates import CZGate, RZGate, SXGate |
| 8 | from qiskit.transpiler.target import Target |
| 9 | |
| 10 | logger = logging.getLogger(__name__) |
| 11 | |
| 12 | |
| 13 | class NeutralAtomTarget: |
| 14 | """Factory for a Qiskit ``Target`` restricted to the NeutralAtomDevice native gate set. |
| 15 | |
| 16 | The native gate set is ``{rz, sx, cz, measure}`` — the only gates that survive |
| 17 | ``NeutralAtomDevice.compile()``'s decomposition pipeline. Using this target ensures |
| 18 | that Qiskit's transpiler decomposes all non-native gates (H, CX, X, etc.) into |
| 19 | native gates *before* QASM3 export, so the noise model fields that matter |
| 20 | (``noise.rz``, ``noise.sx``, ``noise.cz``, ``noise.mresetz``) align with the |
| 21 | gates actually present during simulation. |
| 22 | """ |
| 23 | |
| 24 | @classmethod |
| 25 | def build_target( |
| 26 | cls, |
| 27 | num_qubits: int | None = None, |
| 28 | ) -> Target: |
| 29 | """Return a Qiskit ``Target`` with only the NeutralAtomDevice native gates. |
| 30 | |
| 31 | :param num_qubits: Number of qubits. ``None`` means no limit (simulator). |
| 32 | :return: A ``Target`` containing ``{rz, sx, cz, measure, reset}``. |
| 33 | """ |
| 34 | target = Target(num_qubits=num_qubits) |
| 35 | |
| 36 | target.add_instruction(RZGate(Parameter("theta")), name="rz") |
| 37 | target.add_instruction(SXGate, name="sx") |
| 38 | target.add_instruction(CZGate, name="cz") |
| 39 | target.add_instruction(Measure, name="measure") |
| 40 | # Reset is used internally by NeutralAtomDevice (MResetZ), so include it |
| 41 | # so the transpiler can express mid-circuit resets. |
| 42 | target.add_instruction(Reset, name="reset") |
| 43 | |
| 44 | return target |
| 45 | |