cirq.ops.CSWAP

The Controlled Swap gate, also known as the Fredkin gate.

View aliases

Main aliases

cirq.CSWAP, cirq.FREDKIN, cirq.ops.FREDKIN, cirq.ops.three_qubit_gates.CSWAP, cirq.ops.three_qubit_gates.FREDKIN

cirq.ops.CSWAP(
    *args, **kwargs
)

Used in the notebooks

Used in the tutorials
Introduction to Cirq

If the first qubit is |1⟩, this applies a SWAP between the second and third qubit, otherwise it acts as identity on the second and third qubit.

An instance of cirq.CSwapGate.

Matrix:

    [[1 . . . . . . .],
     [. 1 . . . . . .],
     [. . 1 . . . . .],
     [. . . 1 . . . .],
     [. . . . 1 . . .],
     [. . . . . . 1 .],
     [. . . . . 1 . .],
     [. . . . . . . 1]]