[QI2-1096] pennylane device implementation

README.md

@@ -22,7 +22,7 @@ and [hardware backends](https://www.quantum-inspire.com/kbase/hardware-backends/
 
 ### Emulator backends
 
-* `QX single-node simulator` - Quantum Inspire emulator run on a commodity cloud-based server, with 4GB RAM. It has a fast turn-around time for simulations up to 26 qubits. For basic users, the commodity cloud-based server will be sufficient.
+* `QX emulator` - Quantum Inspire emulator run on a commodity cloud-based server, with 4GB RAM. It has a fast turn-around time for simulations up to 26 qubits. For basic users, the commodity cloud-based server will be sufficient.
 
 ## Installation
 
@@ -44,6 +44,32 @@ pip install -e pluginpath
 
 where `pluginpath` is the location of the plugin. It will then be accessible via PennyLane.
 
+## Submitting a Pennylane Circuit
+
+Once a backend has been specified, it may be used to submit circuits.
+For example, running a Bell State:
+
+```python
+import pennylane as qml
+from pennylane_quantuminspire2.qi_device import QI2Device
+
+# Obtain a specific backend by name (get_backends() returns all)
+backend = QI2Device.get_backend("Spin")
+
+# create the pennylane device from the desired backend
+device = QI2Device(backend=backend)
+
+# Create the quantum function
+@qml.qnode(device=device)
+def quantum_function():
+    qml.Hadamard(wires=[0])
+    return qml.expval(qml.PauliX(wires=[0]))
+
+# Run the quantum funciont
+print(quantum_function())
+
+```
+
 ## Contributing
 
 ...
@@ -65,4 +91,4 @@ tox -e test
 [Apache License 2.0].
 
 [quantum inspire]: https://www.quantum-inspire.com/
-[apache license 2.0]: https://github.com/qiskit-partners/qiskit-ionq/blob/master/LICENSE.txt
+[apache license 2.0]: https://github.com/PennyLaneAI/pennylane/blob/master/LICENSE

pennylane_quantuminspire2/qi_device.py

@@ -0,0 +1,21 @@
+from typing import Any, Optional, Sequence
+
+from pennylane_qiskit import RemoteDevice
+from qiskit_quantuminspire.qi_backend import QIBackend
+from qiskit_quantuminspire.qi_provider import QIProvider
+
+
+class QI2Device(RemoteDevice):  # type: ignore[misc]
+
+    _qi_provider = QIProvider()
+
+    def __init__(self, backend: QIBackend, **kwargs: Any) -> None:
+        super().__init__(wires=backend.num_qubits, backend=backend, shots=backend.default_shots, **kwargs)
+
+    @classmethod
+    def backends(cls) -> Sequence[QIBackend]:
+        return cls._qi_provider.backends()  # type: ignore[no-any-return]
+
+    @classmethod
+    def get_backend(cls, name: Optional[str] = None, id: Optional[int] = None) -> QIBackend:
+        return cls._qi_provider.get_backend(name, id)