From 5f3dc42cb148c4cb095979cf4e1684573ff2c026 Mon Sep 17 00:00:00 2001
From: Kevin Hartman <kevin@hart.mn>
Date: Wed, 22 Nov 2023 11:34:44 -0500
Subject: [PATCH] Initial commit of Python bindings.

---
 crates/accelerate/src/lib.rs                  |  2 ++
 crates/accelerate/src/quantum_info/mod.rs     | 21 ++++++++++++++++
 .../src/quantum_info/two_qubit_decompose.rs   | 24 +++++++++++++++++++
 qiskit/__init__.py                            |  1 +
 test/python/quantum_info/test_accelerate.py   | 23 ++++++++++++++++++
 5 files changed, 71 insertions(+)
 create mode 100644 crates/accelerate/src/quantum_info/mod.rs
 create mode 100644 crates/accelerate/src/quantum_info/two_qubit_decompose.rs
 create mode 100644 test/python/quantum_info/test_accelerate.py

diff --git a/crates/accelerate/src/lib.rs b/crates/accelerate/src/lib.rs
index 9e7d4cbddf72..5e73f74f9a24 100644
--- a/crates/accelerate/src/lib.rs
+++ b/crates/accelerate/src/lib.rs
@@ -32,6 +32,7 @@ mod sampled_exp_val;
 mod sparse_pauli_op;
 mod stochastic_swap;
 mod vf2_layout;
+mod quantum_info;
 
 #[inline]
 pub fn getenv_use_multiple_threads() -> bool {
@@ -54,6 +55,7 @@ fn _accelerate(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
     m.add_wrapped(wrap_pymodule!(pauli_exp_val::pauli_expval))?;
     m.add_wrapped(wrap_pymodule!(dense_layout::dense_layout))?;
     m.add_wrapped(wrap_pymodule!(quantum_circuit::quantum_circuit))?;
+    m.add_wrapped(wrap_pymodule!(quantum_info::quantum_info))?;
     m.add_wrapped(wrap_pymodule!(error_map::error_map))?;
     m.add_wrapped(wrap_pymodule!(sparse_pauli_op::sparse_pauli_op))?;
     m.add_wrapped(wrap_pymodule!(results::results))?;
diff --git a/crates/accelerate/src/quantum_info/mod.rs b/crates/accelerate/src/quantum_info/mod.rs
new file mode 100644
index 000000000000..2308ac36e6ab
--- /dev/null
+++ b/crates/accelerate/src/quantum_info/mod.rs
@@ -0,0 +1,21 @@
+// This code is part of Qiskit.
+//
+// (C) Copyright IBM 2023
+//
+// This code is licensed under the Apache License, Version 2.0. You may
+// obtain a copy of this license in the LICENSE.txt file in the root directory
+// of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+//
+// Any modifications or derivative works of this code must retain this
+// copyright notice, and modified files need to carry a notice indicating
+// that they have been altered from the originals.
+
+pub mod two_qubit_decompose;
+
+use pyo3::prelude::*;
+
+#[pymodule]
+pub fn quantum_info(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_wrapped(wrap_pyfunction!(two_qubit_decompose::decompose_two_qubit_product_gate))?;
+    Ok(())
+}
diff --git a/crates/accelerate/src/quantum_info/two_qubit_decompose.rs b/crates/accelerate/src/quantum_info/two_qubit_decompose.rs
new file mode 100644
index 000000000000..86f4d8f6f80d
--- /dev/null
+++ b/crates/accelerate/src/quantum_info/two_qubit_decompose.rs
@@ -0,0 +1,24 @@
+// This code is part of Qiskit.
+//
+// (C) Copyright IBM 2023
+//
+// This code is licensed under the Apache License, Version 2.0. You may
+// obtain a copy of this license in the LICENSE.txt file in the root directory
+// of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+//
+// Any modifications or derivative works of this code must retain this
+// copyright notice, and modified files need to carry a notice indicating
+// that they have been altered from the originals.
+
+use pyo3::prelude::*;
+
+#[pyfunction]
+#[pyo3(
+text_signature = "(special_unitary_matrix)"
+)]
+pub fn decompose_two_qubit_product_gate(
+    py: Python<'_>,
+    special_unitary_matrix: &PyAny,
+) -> PyObject {
+    "This is a string.".into_py(py)
+}
diff --git a/qiskit/__init__.py b/qiskit/__init__.py
index 219d305321f3..289b1b128759 100644
--- a/qiskit/__init__.py
+++ b/qiskit/__init__.py
@@ -26,6 +26,7 @@
 # and not have to rely on attribute access.  No action needed for top-level extension packages.
 sys.modules["qiskit._accelerate.nlayout"] = qiskit._accelerate.nlayout
 sys.modules["qiskit._accelerate.quantum_circuit"] = qiskit._accelerate.quantum_circuit
+sys.modules["qiskit._accelerate.quantum_info"] = qiskit._accelerate.quantum_info
 sys.modules["qiskit._accelerate.stochastic_swap"] = qiskit._accelerate.stochastic_swap
 sys.modules["qiskit._accelerate.sabre_swap"] = qiskit._accelerate.sabre_swap
 sys.modules["qiskit._accelerate.sabre_layout"] = qiskit._accelerate.sabre_layout
diff --git a/test/python/quantum_info/test_accelerate.py b/test/python/quantum_info/test_accelerate.py
new file mode 100644
index 000000000000..a399e44753d9
--- /dev/null
+++ b/test/python/quantum_info/test_accelerate.py
@@ -0,0 +1,23 @@
+# This code is part of Qiskit.
+#
+# (C) Copyright IBM 2023.
+#
+# This code is licensed under the Apache License, Version 2.0. You may
+# obtain a copy of this license in the LICENSE.txt file in the root directory
+# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+#
+# Any modifications or derivative works of this code must retain this
+# copyright notice, and modified files need to carry a notice indicating
+# that they have been altered from the originals.
+
+"""Tests for synthesis routines in qiskit._accelerate.quantum_info."""
+from qiskit._accelerate.quantum_info import decompose_two_qubit_product_gate
+
+from qiskit.test import QiskitTestCase
+
+
+class TestAccelerate(QiskitTestCase):
+    """Test accelerate."""
+
+    def test_decompose_two_qubit_product_gate(self):
+        self.assertIsNotNone(decompose_two_qubit_product_gate(None))