Matrix H in Subspace 15 with Dimension 4
H is the Hamiltonian. Here we set µ=0. For grand-canonical calculations add -6µ to the main diagonal.
-4*h + U
((-1 - I*Sqrt[3])*t)/Sqrt[2]
0
0
(I*(I + Sqrt[3])*t)/Sqrt[2]
-4*h + U
(-I/2)*(-I + Sqrt[3])*t
0
0
(I/2)*(I + Sqrt[3])*t
-4*h + U
((-1 - I*Sqrt[3])*t)/Sqrt[2]
0
0
(I*(I + Sqrt[3])*t)/Sqrt[2]
-4*h