Benjamín Santos <caos21@gmail.com> writes:

> Is the Knitting algorithm  (K. Kazymyrenko, X. Waintal, Phys. Rev. B
> 77, 115119 (2008)) implemented in kwant?

It's not, as the available MUMPS-based sparse solver is more efficient.
However, for very large systems (i.e. long wires) where the MUMPS-solver
runs out of memory, a RGF- or knitting-based solver would be useful.

A prototype RGF solver for Kwant that uses graph slicing (as described
in Chapter 4 of the PhD thesis of Michael,
http://epub.uni-regensburg.de/12142/) exists, but needs some more work
before it can be released.  We would be happy to assist, if someone
likes to work on this.