In the basis of spin-up and spin-down states, the operator ˆSx has matrix representation ˆSx=ℏ2(0110). The eigenvalues and eigenvect...In the basis of spin-up and spin-down states, the operator ˆSx has matrix representation ˆSx=ℏ2(0110). The eigenvalues and eigenvectors are sx=ℏ2,|+x⟩=1√2(|+z⟩+|−z⟩)sx=−ℏ2,|−x⟩=1√2(|+z⟩−|−z⟩). Convers…