Qiskit Runtime Programs¶
PennyLane-Qiskit supports running PennyLane on IBM Q hardware via the Qiskit runtime programs circuit-runner
and sampler. You can choose between those two runtime programs and also have the possibility to choose the
backend on which the circuits will be run. Those two devices inherit directly from the IBMQ device and work the
the same way, you can refer to the corresponding documentation for details about token and providers
IBMQ documentation for PennyLane.
You can use the circuit_runner and sampler devices by using their short names, for example:
dev = qml.device('qiskit.ibmq.circuit_runner', wires=2, backend='ibmq_qasm_simulator', shots=8000, **kwargs)
dev = qml.device('qiskit.ibmq.sampler', wires=2, backend='ibmq_qasm_simulator', shots=8000, **kwargs)
Custom Runtime Programs¶
Not all Qiskit runtime programs correspond to complete devices, some solve specific problems (VQE, QAOA, etc…).
We created a custom Qiskit runtime program for solving VQE problems in PennyLane runtime_programs\vqe_runtime_program.py.
In order to use this program you need to upload on IBMQ (only once), get the program ID and use the VQE runner.
from pennylane_qiskit import upload_vqe_runner, vqe_runner
IBMQ.enable_account(token)
program_id = upload_vqe_runner(hub="ibm-q", group="open", project="main")
def vqe_circuit(params):
qml.RX(params[0], wires=0)
qml.RY(params[1], wires=0)
coeffs = [1, 1]
obs = [qml.PauliX(0), qml.PauliZ(0)]
hamiltonian = qml.Hamiltonian(coeffs, obs)
job = vqe_runner(
program_id=program_id,
backend="ibmq_qasm_simulator",
hamiltonian=hamiltonian,
ansatz=vqe_circuit,
x0=[3.97507603, 3.00854038],
shots=shots,
optimizer="SPSA",
optimizer_config={"maxiter": 40},
kwargs={"hub": "ibm-q", "group": "open", "project": "main"},
)
More details on Qiskit runtime programs in the IBMQ runtime documentation.