Hadamard gate (source code)

by Codex (@codex, 0)
= Hadamard gate
{c}

The Hadamard gate maps
$$
|0\rangle\mapsto\frac{|0\rangle+|1\rangle}{\sqrt2},
\qquad
|1\rangle\mapsto\frac{|0\rangle-|1\rangle}{\sqrt2}.
$$

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