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# Copyright © 2022-2023 University of Strasbourg. All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
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from mimiqcircuits.operations.gates.standard.sx import GateSX, GateSXDG
from mimiqcircuits.operations.gates.standard.hadamard import GateH
from mimiqcircuits.operations.gates.standard.deprecated import GateU1
import mimiqcircuits.operations.control as mctrl
from symengine import pi
import mimiqcircuits as mc
[docs]
class GateCSX(mctrl.Control):
r"""Two qubit Controled-SX gate.
By convention, the first qubit is the control and second one is the
targets.
**Matrix representation:**
.. math::
\operatorname{CSX} =\begin{pmatrix}
1 & 0 & 0 & 0 \\
0 & 1 & 0 & 0 \\
0 & 0 & \frac{1+i}{2} & \frac{1-i}{2} \\
0 & 0 & \frac{1-i}{2} & \frac{1+i}{2}
\end{pmatrix}
Examples:
>>> from mimiqcircuits import *
>>> GateCSX(), GateCSX().num_controls, GateCSX().num_targets, GateCSX().num_qubits
(CSX, 1, 1, 2)
>>> GateCSX().matrix()
[1.0, 0, 0, 0]
[0, 1.0, 0, 0]
[0, 0, 0.5 + 0.5*I, 0.5 - 0.5*I]
[0, 0, 0.5 - 0.5*I, 0.5 + 0.5*I]
<BLANKLINE>
>>> c = Circuit().push(GateCSX(), 0, 1)
>>> c
2-qubit circuit with 1 instructions:
└── CSX @ q[0], q[1]
<BLANKLINE>
>>> GateCSX().power(2), GateCSX().inverse()
(CX, CSX†)
>>> GateCSX().decompose()
2-qubit circuit with 3 instructions:
├── H @ q[1]
├── CU1((1/2)*pi) @ q[0], q[1]
└── H @ q[1]
<BLANKLINE>
"""
def __init__(self):
super().__init__(1, GateSX())
def _decompose(self, circ, qubits, bits):
a, b = qubits
circ.push(GateH(), b)
circ.push(GateU1(pi / 2).control(1), a, b)
circ.push(GateH(), b)
return circ
[docs]
class GateCSXDG(mctrl.Control):
r"""Two qubit :math:`{CSX}^\dagger` gate.
**Matrix representation:**
.. math::
\operatorname{CSX}^{\dagger} =\begin{pmatrix}
1 & 0 & 0 & 0 \\
0 & 1 & 0 & 0 \\
0 & 0 & \frac{1-i}{2} & \frac{1+i}{2} \\
0 & 0 & \frac{1+i}{2} & \frac{1-i}{2}
\end{pmatrix}
Examples:
>>> from mimiqcircuits import *
>>> GateCSXDG(), GateCSXDG().num_controls, GateCSXDG().num_targets, GateCSXDG().num_qubits
(CSX†, 1, 1, 2)
>>> GateCSXDG().matrix()
[1.0, 0, 0, 0]
[0, 1.0, 0, 0]
[0, 0, 0.5 - 0.5*I, 0.5 + 0.5*I]
[0, 0, 0.5 + 0.5*I, 0.5 - 0.5*I]
<BLANKLINE>
>>> c = Circuit().push(GateCSXDG(), 0, 1)
>>> c
2-qubit circuit with 1 instructions:
└── CSX† @ q[0], q[1]
<BLANKLINE>
>>> GateCSXDG().power(2), GateCSXDG().inverse()
(C(SX†**2), CSX)
>>> GateCSXDG().decompose()
2-qubit circuit with 3 instructions:
├── H @ q[1]
├── CU1((-1/2)*pi) @ q[0], q[1]
└── H @ q[1]
<BLANKLINE>
"""
def __init__(self):
super().__init__(1, GateSXDG())
def _decompose(self, circ, qubits, bits):
a, b = range(self.num_qubits)
circ.push(GateH(), b)
circ.push(GateU1(-pi / 2).control(1), a, b)
circ.push(GateH(), b)
return circ
