TeNPy Forum

Hi! I am trying to calculate the spectral functions S^{xx}(k,\omega) , S^{yy}(k,\omega) and S^{zz}(k,\omega) for a spin 1 AFM chain with anisotropy. I am having trouble with how to use operator_t and operator_t0 together. I have tried to give a list of operators to both, but it doesnt seem quite rig...