Source code for bqskit.ir.gates.constant.ch

"""This module implements the CHGate."""
from __future__ import annotations

import math

from bqskit.ir.gates.constantgate import ConstantGate
from bqskit.ir.gates.qubitgate import QubitGate
from bqskit.qis.unitary.unitarymatrix import UnitaryMatrix


[docs] class CHGate(ConstantGate, QubitGate): """ The controlled-Hadamard gate. The Controlled-H gate is given by the following unitary: .. math:: \\begin{pmatrix} 1 & 0 & 0 & 0 \\\\ 0 & 1 & 0 & 0 \\\\ 0 & 0 & \\frac{\\sqrt{2}}{2} & \\frac{\\sqrt{2}}{2} \\\\ 0 & 0 & \\frac{\\sqrt{2}}{2} & -\\frac{\\sqrt{2}}{2} \\\\ \\end{pmatrix} """ _num_qudits = 2 _qasm_name = 'ch' _utry = UnitaryMatrix( [ [1, 0, 0, 0], [0, 1, 0, 0], [0, 0, math.sqrt(2) / 2, math.sqrt(2) / 2], [0, 0, math.sqrt(2) / 2, -math.sqrt(2) / 2], ], )