CSXGate (#296)

* sxgate * Add t rotation * Tests pass * Black --------- Co-authored-by: Caleb Johnson <[email protected]>
Qiskit · Jul 5, 2023 · cf0017a · cf0017a
1 parent 66baddb
commit cf0017a
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diff --git a/circuit_knitting/cutting/qpd/qpd.py b/circuit_knitting/cutting/qpd/qpd.py
@@ -32,6 +32,7 @@
     ZGate,
     HGate,
     SGate,
+    TGate,
     SdgGate,
     RXGate,
     RYGate,
@@ -46,6 +47,7 @@
     CRXGate,
     CRYGate,
     CRZGate,
+    CSXGate,
 )
 
 from .qpd_basis import QPDBasis
@@ -308,6 +310,14 @@ def _(gate: RXXGate | RYYGate | RZZGate | CRXGate | CRYGate | CRZGate):
     return QPDBasis(maps, coeffs)
 
 
+@_register_qpdbasis_from_gate("csx")
+def _(gate: CSXGate):
+    retval = qpdbasis_from_gate(CRXGate(np.pi / 2))
+    for operations in unique_by_id(m[0] for m in retval.maps):
+        operations.insert(0, TGate())
+    return retval
+
+
 @_register_qpdbasis_from_gate("cx", "cy", "cz", "ch")
 def _(gate: CXGate | CYGate | CZGate | CHGate):
     # Constructing a virtual two-qubit gate by sampling single-qubit operations - Mitarai et al

diff --git a/test/cutting/qpd/test_qpd.py b/test/cutting/qpd/test_qpd.py
@@ -283,5 +283,6 @@ def test_qpdbasis_from_gate_unique_maps(
     def test_supported_gates(self):
         gates = supported_gates()
         self.assertEqual(
-            {"rxx", "ryy", "rzz", "crx", "cry", "crz", "cx", "cy", "cz", "ch"}, gates
+            {"rxx", "ryy", "rzz", "crx", "cry", "crz", "cx", "cy", "cz", "ch", "csx"},
+            gates,
         )
diff --git a/test/cutting/test_cutting_roundtrip.py b/test/cutting/test_cutting_roundtrip.py
@@ -28,6 +28,7 @@
     CRXGate,
     CRYGate,
     CRZGate,
+    CSXGate,
 )
 from qiskit.extensions import UnitaryGate
 from qiskit.quantum_info import PauliList, random_unitary
@@ -54,6 +55,7 @@ def append_random_unitary(circuit: QuantumCircuit, qubits):
         [CYGate()],
         [CZGate()],
         [CHGate()],
+        [CSXGate()],
         [RYYGate(0.0)],
         [RZZGate(np.pi)],
         [RXXGate(np.pi / 3)],