Matching-outcome projector
= Matching-outcome projector
For two labelled orthonormal bases, the event of equal labels is represented by $\sum_j|x_jy_j\rangle\langle x_jy_j|$.
= Matching-outcome projector
For two labelled orthonormal bases, the event of equal labels is represented by $\sum_j|x_jy_j\rangle\langle x_jy_j|$.