I have a hamiltonian of the form H = $d_1∗σ_x$ + $d_2∗σ_y$ + $d_3∗σ_z$+$d_4∗I$. Sigma are the Pauli matrices. How to write this 2∗2 hamiltonian using PythTB package for the following two cases? Case1: $d_1 = t_1∗\sin(kx)$, $d_2=t_2∗\cos(ky)$, $d_3=t_1+t_2∗\sin(kx)$, $d_4=t_2+t_1∗\sin(k_z)+t_2∗\co...