DCXGate

class qiskit.circuit.library.DCXGate

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

Get Clbits in condition.

Get the decompositions of the instruction from the SessionEquivalenceLibrary.

Return definition in terms of other basic gates.

Get the duration.

Return instruction label

Return the name.

Return the number of clbits.

Return the number of qubits.

return instruction params.

Get the time unit of duration.

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