Support commutation check between Pauli-based gates and standard gates

crates/quantum_info/src/sparse_observable/mod.rs

@@ -1,6 +1,6 @@
 // This code is part of Qiskit.
 //
-// (C) Copyright IBM 2024
+// (C) Copyright IBM 2026
 //
 // 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
@@ -10,6 +10,8 @@
 // copyright notice, and modified files need to carry a notice indicating
 // that they have been altered from the originals.
 
+pub mod standard_generators;
+
 mod lookup;
 
 use hashbrown::HashSet;
@@ -4261,8 +4263,19 @@ fn coerce_to_observable<'py>(
         }
     }
 }
+#[pyfunction(name = "_generator_observable")]
+#[pyo3(signature = (gate, params = None))]
+pub fn generator_observable_py(
+    gate: qiskit_circuit::operations::StandardGate,
+    params: Option<Vec<qiskit_circuit::operations::Param>>,
+) -> Option<SparseObservable> {
+    let params = params.unwrap_or_default();
+    standard_generators::generator_observable(gate, &params)
+}
+
 pub fn sparse_observable(m: &Bound<PyModule>) -> PyResult<()> {
     m.add_class::<PySparseObservable>()?;
+    m.add_function(wrap_pyfunction!(generator_observable_py, m)?)?;
     Ok(())
 }