Source code for qlauncher.routines.qiskit.backends.aer_backend

 1"""qiskit_aer implementation of QiskitBackend"""
 2from typing import Literal
 3
 4from qiskit.providers import BackendV1, BackendV2
 5from qiskit.primitives import BackendSamplerV2, BackendEstimatorV2
 6from qiskit_ibm_runtime import Options
 7from qiskit_aer import AerSimulator
 8from qiskit_aer.noise import NoiseModel
 9
10from qlauncher.routines.qiskit.backends.qiskit_backend import QiskitBackend
11
12

[docs]
13class AerBackend(QiskitBackend):
14    """
15    QiskitBackend utilizing the qiskit_aer library. Runs local simulations only, utilizing CUDA capable gpus if available.
16    """
17
18    def __init__(
19        self,
20        name: Literal['local_simulator', 'backendv1v2'],
21        options: Options | None = None,
22        backendv1v2: BackendV1 | BackendV2 | None = None,
23        auto_transpile_level: Literal[0, 1, 2, 3] | None = None,
24        simulation_method: str = 'automatic',
25        simulation_device: Literal['CPU', 'GPU'] = 'CPU',
26    ) -> None:
27        self.method = simulation_method
28        self.device = simulation_device
29        super().__init__(name, options, backendv1v2, auto_transpile_level)
30
31    def _set_primitives_on_backend_name(self):
32        if self.name == 'local_simulator':
33            self.simulator = AerSimulator(method=self.method, device=self.device)
34        elif self.name == 'backendv1v2':
35            if self.backendv1v2 is None:
36                raise AttributeError(
37                    'Please indicate a backend when in backendv1v2 mode.')
38            noise_model = NoiseModel.from_backend(self.backendv1v2)
39            self.simulator = AerSimulator(method=self.method, device=self.device, noise_model=noise_model)
40        else:
41            raise ValueError(
42                f"Unsupported mode for this backend:'{self.name}'. Please use one of the following: ['local_simulator', 'backendv1v2']")
43
44        self.sampler = BackendSamplerV2(backend=self.simulator)
45        self.estimator = BackendEstimatorV2(backend=self.simulator)
46
47        self._configure_auto_behavior()
48

[docs]
49    def set_options(self, **fields):
50        """Set additional options for the instance AerSimulator"""
51        self.simulator.set_options(**fields)