Merge pull request #361 from BQSKit/sxdg

Support for SXdg gates

Author: edyounis

bqskit/ir/gates/__init__.py

@@ -43,6 +43,8 @@
     SwapGate
     SqrtXGate
     SXGate
+    SqrtXdgGate
+    SXdgGate
     SycamoreGate
     TGate
     TdgGate

bqskit/ir/gates/constant/__init__.py

@@ -34,6 +34,8 @@
 from bqskit.ir.gates.constant.swap import SwapGate
 from bqskit.ir.gates.constant.sx import SqrtXGate
 from bqskit.ir.gates.constant.sx import SXGate
+from bqskit.ir.gates.constant.sxdg import SqrtXdgGate
+from bqskit.ir.gates.constant.sxdg import SXdgGate
 from bqskit.ir.gates.constant.sycamore import SycamoreGate
 from bqskit.ir.gates.constant.t import TGate
 from bqskit.ir.gates.constant.tdg import TdgGate
@@ -79,6 +81,8 @@
     'SwapGate',
     'SqrtXGate',
     'SXGate',
+    'SqrtXdgGate',
+    'SXdgGate',
     'SycamoreGate',
     'TGate',
     'TdgGate',

bqskit/ir/gates/constant/sxdg.py

@@ -0,0 +1,33 @@
+"""This module implements the SqrtXdgGate/SXdgGate."""
+from __future__ import annotations
+
+from bqskit.ir.gates.constantgate import ConstantGate
+from bqskit.ir.gates.qubitgate import QubitGate
+from bqskit.qis.unitary.unitarymatrix import UnitaryMatrix
+
+
+class SqrtXdgGate(ConstantGate, QubitGate):
+    """
+    The Dagger(Sqrt(X)) gate.
+
+    The SXdg gate is given by the following unitary:
+
+    .. math::
+
+        \\begin{pmatrix}
+        \\frac{1}{2} - \\frac{1}{2}i & \\frac{1}{2} + \\frac{1}{2}i \\\\
+        \\frac{1}{2} + \\frac{1}{2}i & \\frac{1}{2} - \\frac{1}{2}i \\\\
+        \\end{pmatrix}
+    """
+
+    _num_qudits = 1
+    _qasm_name = 'sxdg'
+    _utry = UnitaryMatrix(
+        [
+            [0.5 - 0.5j, 0.5 + 0.5j],
+            [0.5 + 0.5j, 0.5 - 0.5j],
+        ],
+    )
+
+
+SXdgGate = SqrtXdgGate