created IQM_SCHEMA (#153)

pytket/extensions/braket/backends/braket.py

@@ -107,6 +107,10 @@
     "name": "braket.device_schema.oqc.oqc_provider_properties",
     "version": "1",
 }
+IQM_SCHEMA = {
+    "name": "braket.device_schema.iqm.iqm_provider_properties",
+    "version": "1",
+}
 
 _gate_types = {
     "amplitude_damping": None,
@@ -495,18 +499,34 @@ def _get_arch_info(
             if connectivity["fullyConnected"]:
                 all_qubits: List = list(range(n_qubits))
             else:
+                schema = device_properties["provider"]["braketSchemaHeader"]
                 connectivity_graph = connectivity["connectivityGraph"]
                 # Convert strings to ints
-                connectivity_graph = dict(
-                    (int(k), [int(v) for v in l]) for k, l in connectivity_graph.items()
-                )
-                # each connectivity graph key will be an int
-                # connectivity_graph values will be lists
-                all_qubits_set = set()
-                for k, v in connectivity_graph.items():
-                    all_qubits_set.add(k)
-                    all_qubits_set.update(v)
-                all_qubits = list(all_qubits_set)
+                if schema == IQM_SCHEMA:
+                    connectivity_graph = dict(
+                        (int(k) - 1, [int(v) - 1 for v in l])
+                        for k, l in connectivity_graph.items()
+                    )
+                    # each connectivity graph key will be an int
+                    # connectivity_graph values will be lists
+                    all_qubits_set = set()
+                    for k, v in connectivity_graph.items():
+                        all_qubits_set.add(k - 1)
+                        for l in v:
+                            all_qubits_set.add(l - 1)
+                    all_qubits = list(all_qubits_set)
+                else:
+                    connectivity_graph = dict(
+                        (int(k), [int(v) for v in l])
+                        for k, l in connectivity_graph.items()
+                    )
+                    # each connectivity graph key will be an int
+                    # connectivity_graph values will be lists
+                    all_qubits_set = set()
+                    for k, v in connectivity_graph.items():
+                        all_qubits_set.add(k)
+                        all_qubits_set.update(v)
+                    all_qubits = list(all_qubits_set)
         else:
             all_qubits = list(range(n_qubits))
 
@@ -566,6 +586,32 @@ def _get_backend_info(
                 get_link_error = lambda n0, n1: 1.0 - cast(
                     float, props2q[f"{n0.index[0]}-{n1.index[0]}"]["fCX"]
                 )
+            elif schema == IQM_SCHEMA:
+                properties = characteristics["properties"]
+                props1q = {}
+                for key in properties["one_qubit"].keys():
+                    node1q = str(int(key) - 1)
+                    props1q[node1q] = properties["one_qubit"][key]
+                props2q = {}
+                for key in properties["two_qubit"].keys():
+                    ind = key.index("-")
+                    node2q1, node2q2 = str(int(key[:ind]) - 1), str(
+                        int(key[ind + 1 :]) - 1
+                    )
+                    props2q[node2q1 + "-" + node2q2] = properties["two_qubit"][key]
+                get_node_error = lambda n: 1.0 - cast(
+                    float, props1q[f"{n.index[0]}"]["f1Q_simultaneous_RB"]
+                )
+                get_readout_error = lambda n: 1.0 - cast(
+                    float, props1q[f"{n.index[0]}"]["fRO"]
+                )
+                get_link_error = lambda n0, n1: 1.0 - cast(
+                    float,
+                    props2q[
+                        f"{min(n0.index[0],n1.index[0])}-{max(n0.index[0],n1.index[0])}"
+                    ]["fCZ"],
+                )
+
             # readout error as symmetric 2x2 matrix
             to_sym_mat: Callable[[float], List[List[float]]] = lambda x: [
                 [1.0 - x, x],

setup.py

@@ -45,7 +45,7 @@
     install_requires=[
         "pytket ~= 1.27",
         "amazon-braket-sdk ~= 1.53",
-        "amazon-braket-schemas ~= 1.19",
+        "amazon-braket-schemas ~= 1.22",
         "amazon-braket-default-simulator ~= 1.20",
         "boto3-stubs",
     ],

tests/backend_test.py

@@ -310,6 +310,51 @@ def test_oqc(authenticated_braket_backend: BraketBackend) -> None:
     b.cancel(h)
 
 
+@pytest.mark.skipif(skip_remote_tests, reason=REASON)
+@pytest.mark.parametrize(
+    "authenticated_braket_backend",
+    [
+        {
+            "device_type": "qpu",
+            "provider": "iqm",
+            "device": "Garnet",
+            "region": "eu-north-1",
+        }
+    ],
+    indirect=True,
+)
+def test_iqm(authenticated_braket_backend: BraketBackend) -> None:
+    b = authenticated_braket_backend
+    skip_if_device_is_not_available(b)
+    assert b.persistent_handles
+    assert b.supports_shots
+    assert not b.supports_state
+
+    chars = b.characterisation
+    assert chars is not None
+    assert all(s in chars for s in ["NodeErrors", "EdgeErrors", "ReadoutErrors"])
+
+    c = (
+        Circuit(3)
+        .add_gate(OpType.CCX, [0, 1, 2])
+        .add_gate(OpType.U1, 0.5, [1])
+        .add_gate(OpType.ISWAP, 0.5, [0, 2])
+        .add_gate(OpType.XXPhase, 0.5, [1, 2])
+    )
+    assert not b.valid_circuit(c)
+    c = b.get_compiled_circuit(c)
+    assert b.valid_circuit(c)
+    h = b.process_circuit(c, 10)
+    _ = b.circuit_status(h)
+    b.cancel(h)
+
+    # Circuit with unused qubits
+    c = Circuit(20).H(5).CX(5, 6)
+    c = b.get_compiled_circuit(c)
+    h = b.process_circuit(c, 10)
+    b.cancel(h)
+
+
 def test_local_simulator() -> None:
     b = BraketBackend(local=True)
     assert b.supports_shots