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bor0000
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Proof: Any unitary matrix U in C(nxn) can be expressed as e^A, where A is skew-symmetric in C(nxn).
Hint: U=Qdiag(m1...,mn)Q* and the absolute value of the eigenvalues of U is 1.
thanks!
Hint: U=Qdiag(m1...,mn)Q* and the absolute value of the eigenvalues of U is 1.
thanks!