Dear Anya,
1. If you need custom lattices, the easiest option is to write a “graph file”.
You can then specify different edge types and refer to them in the parameters, e.g. J0 for the value of J on the bond of type 0, J1 for the bond of type 1, etc.
2. I think everything you need is the application example/model/print_symbolic3.cpp
3. The diagonalization applications do not perform any fourier transform of the model automatically. Actually the ALPS model library supports only up to two-body interaction.
You can disable this feature with the parameter TRANSLATION_SYMMETRY=false
Best,
Michele
Dear All,
I am new to ALPS and would really appreciate any help on the following -
1. I am trying to numerically reproduce the results in this paper by Chen and Nussinov (
https://arxiv.org/abs/cond-mat/0703633) - the part where they describe free fermion on the kitaev model.
One can see that the lattice of the fermions is a square one with 2 bond types(anisotropy). How do I mention that in ALPS?
2. Can I see the matrix elements of the matrix that ALPS diagonalises?
3. Also, does ALPS dmrg, sparsediag, full diag etc use fourier transform for free fermion models? Where can I see the source codes?
What if I don't want to FT to momentum space because k will not be a good quantum number if I introduce some translation symmetry destroying disorder?
Thank you very much,
Anya Weng
----
Comp-phys-alps-users Mailing List for the ALPS Project
http://alps.comp-phys.org/List info: https://lists.phys.ethz.ch//listinfo/comp-phys-alps-users
Archive: https://lists.phys.ethz.ch//pipermail/comp-phys-alps-users
Unsubscribe by writing a mail to comp-phys-alps-users-leave@lists.phys.ethz.ch.