Matrix t*K(1) in Subspace 103 with Dimension 3

(K(1) is the first-order Grosse operator)

I*Sqrt[3]*t (I/2)*(I + Sqrt[3])*U -(((-3*I + Sqrt[3])*t)/Sqrt[2])
(U + I*Sqrt[3]*U)/2 (-I)*Sqrt[3]*t 0
((3*I + Sqrt[3])*t)/Sqrt[2] 0 0