cirq.ops.bit_flip

Construct a BitFlipChannel that flips a qubit state

Used in the notebooks

Used in the tutorials

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

$$\rho \rightarrow M_0 \rho M_0^\dagger + M_1 \rho M_1^\dagger$$

With

\begin{aligned} 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} \end{aligned}

p the probability of a bit flip.

ValueError if p is not a valid probability.