cirq.bit_flip

cirq.bit_flip(p: Optional[float] = None) → Union[cirq.ops.common_gates.XPowGate, cirq.ops.common_channels.BitFlipChannel]

Construct a BitFlipChannel that flips a qubit state

with probability of a flip given by p. If p is None, return

a guaranteed flip in the form of an X operation.

This channel evolves a density matrix via

\rho -> M_0 \rho M_0^\dagger + M_1 \rho M_1^\dagger

With

M_0 = \sqrt{p} \begin{bmatrix}

1 & 0 \

0 & 1

\end{bmatrix}

M_1 = \sqrt{1-p} \begin{bmatrix}

0 & 1 \

1 & -0

\end{bmatrix}

Parameters:p – the probability of a bit flip. Raises:ValueError – if p is not a valid probability.