Update deprecated gradient_fn argument to diff_method (#1264)

**Summary:** Updating deprecated code that was introduced from a recent deprecation PennyLaneAI/pennylane#6549. [sc-77590]
PennyLaneAI · Nov 12, 2024 · 0d7c3fb · 0d7c3fb
1 parent 3370db1
commit 0d7c3fb
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Showing 4 changed files with 6 additions and 6 deletions.
diff --git a/demonstrations/tutorial_error_mitigation.metadata.json b/demonstrations/tutorial_error_mitigation.metadata.json
@@ -9,7 +9,7 @@
         }
     ],
     "dateOfPublication": "2021-11-29T00:00:00+00:00",
-    "dateOfLastModification": "2024-11-06T00:00:00+00:00",
+    "dateOfLastModification": "2024-11-12T00:00:00+00:00",
     "categories": [
         "Algorithms",
         "Quantum Computing"

diff --git a/demonstrations/tutorial_error_mitigation.py b/demonstrations/tutorial_error_mitigation.py
@@ -273,7 +273,7 @@ def executor(circuits, dev=dev_noisy):
         )
         circuits_with_meas.append(circuit_with_meas)
 
-    return qml.execute(circuits_with_meas, dev, gradient_fn=None)
+    return qml.execute(circuits_with_meas, dev, diff_method=None)
 
 
 ##############################################################################
@@ -540,7 +540,7 @@ def executor(circuit):
         circuits, postproc = qml.transforms.split_non_commuting(
             circuit_with_meas, grouping_strategy=None
         )
-        circuits_executed = qml.execute(circuits, dev_noisy, gradient_fn=None)
+        circuits_executed = qml.execute(circuits, dev_noisy, diff_method=None)
         return postproc(circuits_executed)
 
     mitig_energy = execute_with_zne(circuit, executor, scale_noise=fold_global)

diff --git a/demonstrations/tutorial_quantum_circuit_cutting.metadata.json b/demonstrations/tutorial_quantum_circuit_cutting.metadata.json
@@ -12,7 +12,7 @@
         }
     ],
     "dateOfPublication": "2022-09-02T00:00:00+00:00",
-    "dateOfLastModification": "2024-11-06T00:00:00+00:00",
+    "dateOfLastModification": "2024-11-12T00:00:00+00:00",
     "categories": [
         "Algorithms", "Quantum Computing"
     ],

diff --git a/demonstrations/tutorial_quantum_circuit_cutting.py b/demonstrations/tutorial_quantum_circuit_cutting.py
@@ -741,10 +741,10 @@ def make_kraus_ops(num_wires: int):
 tape0 = QuantumTape(ops=ops_0, measurements=tape.measurements, shots=channel_shots[0].item())
 tape1 = QuantumTape(ops=ops_1, measurements=tape.measurements, shots=channel_shots[1].item())
 
-(shots0,) = qml.execute([tape0], device=device, cache=False, gradient_fn=None)
+(shots0,) = qml.execute([tape0], device=device, cache=False, diff_method=None)
 samples[choices == 0] = shots0
 
-(shots1,) = qml.execute([tape1], device=device, cache=False, gradient_fn=None)
+(shots1,) = qml.execute([tape1], device=device, cache=False, diff_method=None)
 samples[choices == 1] = shots1
 
 ######################################################################