PeterDonis Mentor Insights Author Messages 50,458 Reaction score 26,515 Dec 4, 2018 #121 zonde said: I don't know if there is some general rule about possibility to implement some measurement. Any set of orthogonal vectors that span a Hilbert space must be eigenvectors of some Hermitian operator on that Hilbert space.
zonde said: I don't know if there is some general rule about possibility to implement some measurement. Any set of orthogonal vectors that span a Hilbert space must be eigenvectors of some Hermitian operator on that Hilbert space.