TeNPy Forum

Hi, I am doing a periodic boundary Ising model with N sites (say 40 sites) and I am time evolving with the following code: #Time evolution parameters evol_params = { 'N_steps':1, 'compression_method': 'SVD', ### same results for 'SVD' and 'variational' 'trunc_params': {"chi_max": chi,"...

Hi, I am getting an error when I tried to calculate the entropy of a segment whose size is greater than 20 for the TFI model. S_Ags=psi.entanglement_entropy_segment(segment=subregion, first_site=[start_site], n=1) ValueError: too large segment; this is exponentially expensive! How to over-ride this ...