Here matrix representation of T with respect to standard basis {(1,0,0),(0,1,0),(0,0,1)} over the field C is A=
⎝⎛1i0i−2−i001⎠⎞
Now , T∗= Transpose conjugate of matrix representation of T
=AH
= ⎝⎛1−i0−i−2i001⎠⎞
Since ,A=AH
Hence, T is not a self adjoint operator.
To check unitary operators ,
Consider A.AH= ⎝⎛23i−1−3i52i−1−2i2⎠⎞ =I
Where I stands for identity matrix.
Therefore,T is not a unitary operator.
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