Swap operator
= Swap operator
{title2=$F$}
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The swap operator exchanges two tensor factors: $F(|\psi\rangle\otimes|\phi\rangle)=|\phi\rangle\otimes|\psi\rangle$. It has <eigenvalue> $+1$ on the symmetric subspace and $-1$ on the antisymmetric subspace, and the <partial transpose> of $|\Phi^+\rangle\langle\Phi^+|$ is $F/d$.