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rzx_zz1.py
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/
rzx_zz1.py
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# This code is part of Qiskit.
#
# (C) Copyright IBM 2021.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.
"""
RZX based template for CX - phase - CX
.. parsed-literal::
»
q_0: ──■────────────────────────────────────────────■───────────────────────»
┌─┴─┐┌───────┐┌────┐┌───────┐┌────┐┌────────┐┌─┴─┐┌────────┐┌─────────┐»
q_1: ┤ X ├┤ RZ(ϴ) ├┤ √X ├┤ RZ(π) ├┤ √X ├┤ RZ(3π) ├┤ X ├┤ RZ(-ϴ) ├┤ RZ(π/2) ├»
└───┘└───────┘└────┘└───────┘└────┘└────────┘└───┘└────────┘└─────────┘»
« ┌──────────┐ »
«q_0: ───────────────────────────────┤0 ├──────────────────────»
« ┌─────────┐┌─────────┐┌───────┐│ RZX(-ϴ) │┌─────────┐┌─────────┐»
«q_1: ┤ RX(π/2) ├┤ RZ(π/2) ├┤ RX(ϴ) ├┤1 ├┤ RZ(π/2) ├┤ RX(π/2) ├»
« └─────────┘└─────────┘└───────┘└──────────┘└─────────┘└─────────┘»
«
«q_0: ───────────
« ┌─────────┐
«q_1: ┤ RZ(π/2) ├
« └─────────┘
"""
from __future__ import annotations
import numpy as np
from qiskit.circuit import Parameter, QuantumCircuit
from qiskit.circuit.parameterexpression import ParameterValueType
def rzx_zz1(theta: ParameterValueType | None = None):
"""Template for CX - RZGate - CX."""
if theta is None:
theta = Parameter("ϴ")
qc = QuantumCircuit(2)
qc.cx(0, 1)
qc.rz(theta, 1)
qc.sx(1)
qc.rz(np.pi, 1)
qc.sx(1)
qc.rz(3 * np.pi, 1)
qc.cx(0, 1)
qc.rz(-1 * theta, 1)
# Hadamard
qc.rz(np.pi / 2, 1)
qc.rx(np.pi / 2, 1)
qc.rz(np.pi / 2, 1)
qc.rx(theta, 1)
qc.rzx(-1 * theta, 0, 1)
# Hadamard
qc.rz(np.pi / 2, 1)
qc.rx(np.pi / 2, 1)
qc.rz(np.pi / 2, 1)
return qc