Applicability and limiations of Cluster Perturbation Theory for Hubbard models

These are the Cluster Greensfunctions that were used in the paper "Applicability and limiations of Cluster<br> Perturbation Theory for Hubbard models" published as part of the special edition “S.I.: Non-Equilibrium Quantum<br> Physics, Many Body Systems, and Foundations of Quantum Mechanics” in the European Journal of Phyiscs in 2023.<br> The Greensfunctions were generated via a Chebyshev expansion and are currently in a real space representation.<br> You may use python and import them via numpy as follows: ```console<br> import numpy as np MC = &lt;number_of_sites&gt; # Here you have to add the number of cluster sites (e.g. 16 for a 4x4 cluster) greensfunctions = np.genfromtxt("&lt;file_name&gt;")<br> greensfunctions = greensfunctions.reshape(greensfunctions.shape[0], MC, MC)<br> ``` This way you obtain a tensor where the first dimension corresponds to the frequency and the other two<br> to the real space indices. For further questions please contact the corresponding author Nicklas Enenkel via E-mail<br> ([e-mail])