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pennylane_lightning/lightning_tensor/_tensornet.py

@@ -80,11 +80,7 @@ def gate_matrix_decompose(gate_ops_matrix, wires, max_mpo_bond_dim, c_dtype):
     """Permute and decompose a gate matrix into MPO sites. This method return the MPO sites in the Fortran order of the ``cutensornet`` backend. Note that MSB in the Pennylane convention is the LSB in the ``cutensornet`` convention."""
     sorted_indexed_wires = sorted(enumerate(wires), key=lambda x: x[1])
 
-    sorted_wires = []
-    original_axes = []
-    for index, wire in sorted_indexed_wires:
-        sorted_wires.append(wire)
-        original_axes.append(index)
+    original_axes, sorted_wires = zip(*sorted_indexed_wires)
 
     tensor_shape = [2] * len(wires) * 2
 

tests/lightning_tensor/test_tensornet_class.py

@@ -101,7 +101,7 @@ def test_gate_matrix_decompose():
     gate = scipy.linalg.expm(1j * hermitian)
     original_gate = gate.copy()  # for later to double check
 
-    max_mpo_bond_dim = 2**len(wires)
+    max_mpo_bond_dim = 2 ** len(wires)
 
     mpos, sorted_wired = gate_matrix_decompose(gate, wires, max_mpo_bond_dim, np.complex128)