DCXGate#

class qiskit.circuit.library.DCXGate[fuente]#

Bases: Gate

Double-CNOT gate.

A 2-qubit Clifford gate consisting of two back-to-back CNOTs with alternate controls.

Can be applied to a QuantumCircuit with the dcx() method.

          ┌───┐
q_0: ──■──┤ X ├
     ┌─┴─┐└─┬─┘
q_1: ┤ X ├──■──
     └───┘

This is a classical logic gate, equivalent to a CNOT-SWAP (CNS) sequence, and locally equivalent to an iSWAP.

\[\begin{split}DCX\ q_0, q_1 = \begin{pmatrix} 1 & 0 & 0 & 0 \\ 0 & 0 & 0 & 1 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \end{pmatrix}\end{split}\]

Create new DCX gate.

Attributes

decompositions#: Get the decompositions of the instruction from the SessionEquivalenceLibrary.