bind RZZ to pi/2 if Rzz(theta) in basis

ewinston · Jul 18, 2024 · c45d02d · c45d02d
1 parent d2eb307
commit c45d02d
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/qiskit/transpiler/passes/synthesis/unitary_synthesis.py b/qiskit/transpiler/passes/synthesis/unitary_synthesis.py
@@ -49,6 +49,7 @@
     CZGate,
     RXXGate,
     RZXGate,
+    RZZGate,
     ECRGate,
     RXGate,
     SXGate,
@@ -779,6 +780,8 @@ def _replace_parameterized_gate(op):
                 op = RXXGate(pi / 2)
             elif isinstance(op, RZXGate) and isinstance(op.params[0], Parameter):
                 op = RZXGate(pi / 4)
+            elif isinstance(op, RZZGate) and isinstance(op.params[0], Parameter):
+                op = RZZGate(pi / 2)
             return op
 
         try:
@@ -817,15 +820,15 @@ def _replace_parameterized_gate(op):
         def is_supercontrolled(gate):
             try:
                 operator = Operator(gate)
-            except (QiskitError, TypeError):  # TypeError: parametrized gate
+            except QiskitError:
                 return False
             kak = TwoQubitWeylDecomposition(operator.data)
             return isclose(kak.a, pi / 4) and isclose(kak.c, 0.0)
 
         def is_controlled(gate):
             try:
                 operator = Operator(gate)
-            except (QiskitError, TypeError):  # TypeError: parametrized gate
+            except QiskitError:
                 return False
             kak = TwoQubitWeylDecomposition(operator.data)
             return isclose(kak.b, 0.0) and isclose(kak.c, 0.0)