I'm not sure where to post this, so here it is:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\left[\begin{array}{cccc}

1&0&0&0\\

0&1&0&0\\

0&0&0&1\\

0&0&1&0\\

\end{array}\right][/tex]

How is this a controlled NOT gate? If I multiply this with [tex]\left[\begin{array}{c}1\\0\\1\\0\end{array}\right][/tex], the second bit is flipped regardless.

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# Controlled Not Gate

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