Hi,

I am using ITensor Julia to calculate the ground state of a two-leg ladder model by DMRG. while doing it I first kept fewer bond dimensions( that I know previously from reference) to found the ground state, and whatever state (psi) I got from it I keep it as an initial state for the next program with more bond dimensions to prove ground state energy is converging. But I am facing some errors while doing it. so my questions are as follows

a)

Where new2 is a file where I stored ground state(psi) and keep the same state in dmrg function to find a new state, but I got an error as follows.

So, can you tell me how to fix it?

b) I think (please correct me if I am wrong) the dmrg code is available in the documentation is of two sites Dmrg method, is there any way we can customize it into the one-site?

Thanks

Paban