Source code for mimiqcircuits.operations.gates.standard.swap

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import mimiqcircuits.operations.gates.gate as mcg
from mimiqcircuits.operations.gates.standard.cpauli import GateCX
from mimiqcircuits.operations.utils import power_idempotent, control_one_defined
import mimiqcircuits as mc
from symengine import Matrix


[docs] class GateSWAP(mcg.Gate): r"""Two qubit SWAP gate. See Also :func:`GateISWAP` **Matrix representation:** .. math:: \operatorname{SWAP} = \begin{pmatrix} 1 & 0 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 0 & 1 \end{pmatrix} Examples: >>> from mimiqcircuits import * >>> GateSWAP() SWAP >>> GateSWAP().matrix() [1.0, 0, 0, 0] [0, 0, 1.0, 0] [0, 1.0, 0, 0] [0, 0, 0, 1.0] <BLANKLINE> >>> c = Circuit().push(GateSWAP(), 0, 1) >>> GateSWAP().power(2), GateSWAP().inverse() (Parallel(2, ID), SWAP) >>> GateSWAP().decompose() 2-qubit circuit with 3 instructions: ├── CX @ q[0], q[1] ├── CX @ q[1], q[0] └── CX @ q[0], q[1] <BLANKLINE> """ _name = "SWAP" _num_qubits = 2 _qregsizes = [2] def _matrix(self): return Matrix([[1, 0, 0, 0], [0, 0, 1, 0], [0, 1, 0, 0], [0, 0, 0, 1]])
[docs] def inverse(self): return self
def _power(self, p): # SWAP^(2n) = ID # SWAP^(2n + 1) = SWAP return power_idempotent(self, p) def _control(self, n): return control_one_defined(n, self, mc.GateCSWAP()) def _decompose(self, circ, qubits, bits): c, t = qubits circ.push(GateCX(), c, t) circ.push(GateCX(), t, c) circ.push(GateCX(), c, t) return circ