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Construct a BitFlipChannel that flips a qubit state with probability p.
cirq.bit_flip(
p: Optional[float] = None
) -> Union[cirq.XPowGate
, cirq.BitFlipChannel
]
Used in the notebooks
Used in the tutorials |
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If p is None, this returns 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
$$
\begin{aligned}
M_0 =& \sqrt{p} \begin{bmatrix}
1 & 0 \\
0 & 1
\end{bmatrix}
\\
M_1 =& \sqrt{1-p} \begin{bmatrix}
0 & 1 \\
1 & -0
\end{bmatrix}
\end{aligned}
$$
Args | |
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p
|
the probability of a bit flip. |
Raises | |
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ValueError
|
if p is not a valid probability. |