TeNPy Forum

At first glance, I do not see why this code should raise such an error.
Please make sure you are using an up to date version of tenpy.
If the problem persists, please open an issue on github with a minimal code example that reproduces the bug, and include the full error message.

For Array_to_ndarray, the low hanging fruits are to operate on numpy arrays instead of python lists. I probably would initialize a final_array of correct length (sum of the ``block.size`` for all blocks) and dtype, then in the loop set elements of the final_array to the block (keep somecounter varia...

Hi, This can not be done out of the box. TEBD will also be difficult, since your gates are not nearest neighbour (even if H_i are NN on their subsystem, they are NNN on the full system). You could force TEBD by grouping sites to a nearest neighbour model. I would go for MPO time evolution though. Yo...

Yes, you can have a look at the operator in the site In [3]: import tenpy as tp In [4]: site = tp.FermionSite(filling=0.5) In [5]: site.dN Out[5]: <npc.Array shape=(2, 2) labels=['p', 'p*']> In [6]: site.dN.to_ndarray() Out[6]: array([[-0.5, 0. ], [ 0. , 0.5]]) In[7]: # The basis is { |empty> , |ful...

Hi,
Yes it turns out those examples are not yet updated for v1.0.
They should run with v0.99.
Working on a fix in https://github.com/tenpy/tenpy/pull/400.
Thanks for posting!