Assume a have a SBox and want to make quantum circuit for it. The unitary transform matrix for a SBox is special - a permutation matrix. I found an algorithm to decompose any unitary matrix into two-level unitary matrices. But it's not optomized in this case. So i wanna ask, is there any algorithm or any technique to decompose this permutation matrix in this special case into two-level unitary matrices. Thank you.

  • 1
    $\begingroup$ This might interest you. $\endgroup$
    – ChrisD
    Mar 20 at 4:46


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