From f12268ee3952ae40f74a44ef0bf17e8e9d416549 Mon Sep 17 00:00:00 2001
From: Trevor Grant <trevor.d.grant@gmail.com>
Date: Fri, 26 Jul 2024 21:15:22 -0500
Subject: [PATCH] Closes #2213 Implement Amazon Bracket backend

---
 pyproject.toml                 |  1 +
 qumat/amazon_braket_backend.py | 64 ++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 qumat/amazon_braket_backend.py

diff --git a/pyproject.toml b/pyproject.toml
index 929cab925..20f24b2eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,7 @@ python = "^3.9"
 qiskit = "^0.45.1"
 qiskit-aer = "^0.13.2"
 cirq = "^1.3.0"
+amazon-braket-sdk = "^1.10.0"
 
 [tool.poetry.dev-dependencies]
 pytest = "^8.1.1"
diff --git a/qumat/amazon_braket_backend.py b/qumat/amazon_braket_backend.py
new file mode 100644
index 000000000..ad1b04a75
--- /dev/null
+++ b/qumat/amazon_braket_backend.py
@@ -0,0 +1,64 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from braket.aws import AwsQuantumSimulator, AwsDevice
+from braket.circuits import Circuit
+
+def initialize_backend(backend_config):
+    backend_options = backend_config['backend_options']
+    simulator_type = backend_options.get('simulator_type', 'default')
+    if simulator_type == 'default':
+        return AwsDevice("arn:aws:braket:::device/quantum-simulator/amazon/sv1")
+    else:
+        print(f"Simulator type '{simulator_type}' is not supported in Amazon Braket. Using default.")
+        return AwsDevice("arn:aws:braket:::device/quantum-simulator/amazon/sv1")
+
+def create_empty_circuit(num_qubits):
+    return Circuit()
+
+def apply_not_gate(circuit, qubit_index):
+    circuit.x(qubit_index)
+
+def apply_hadamard_gate(circuit, qubit_index):
+    circuit.h(qubit_index)
+
+def apply_cnot_gate(circuit, control_qubit_index, target_qubit_index):
+    circuit.cnot(control_qubit_index, target_qubit_index)
+
+def apply_toffoli_gate(circuit, control_qubit_index1, control_qubit_index2, target_qubit_index):
+    circuit.ccnot(control_qubit_index1, control_qubit_index2, target_qubit_index)
+
+def apply_swap_gate(circuit, qubit_index1, qubit_index2):
+    circuit.swap(qubit_index1, qubit_index2)
+
+def apply_pauli_x_gate(circuit, qubit_index):
+    circuit.x(qubit_index)
+
+def apply_pauli_y_gate(circuit, qubit_index):
+    circuit.y(qubit_index)
+
+def apply_pauli_z_gate(circuit, qubit_index):
+    circuit.z(qubit_index)
+
+def execute_circuit(circuit, backend, backend_config):
+    shots = backend_config['backend_options'].get('shots', 1)
+    task = backend.run(circuit, shots=shots)
+    result = task.result()
+    return result.measurement_counts
+
+# placeholder method for use in the testing suite
+def get_final_state_vector(circuit, backend, backend_config):
+    raise NotImplementedError("Final state vector calculation is not currently supported with Amazon Braket.")
\ No newline at end of file