Search found 3 matches
- 14 Apr 2021, 01:00
- Forum: HowTos and FAQ for TeNPy
- Topic: finite open, finite periodic and infinite periodic chains
- Replies: 10
- Views: 11456
Re: finite open, finite periodic and infinite periodic chains
Whoa, I wasn't aware that you want to run it for non-hermitian H. Lancos implicitly assumes that H is hermitian! For that reason at least TeNPy's implementation of TDVP (which uses Lancos to do the local time evolution) does not work for that case! Dropping the hermiticity of H is in general very d...
- 10 Apr 2021, 14:57
- Forum: HowTos and FAQ for TeNPy
- Topic: finite open, finite periodic and infinite periodic chains
- Replies: 10
- Views: 11456
Re: finite open, finite periodic and infinite periodic chains
Even though the model is originially nearest-neighbor on the periodic chain, it will have longer-range interactions in the (open-boundary) MPS - with default ordering, there is one interaction going from site 0 to site L-1, or if you use the "folded" order, most of the originally nearest-...
- 28 Jan 2021, 17:36
- Forum: HowTos and FAQ for TeNPy
- Topic: finite open, finite periodic and infinite periodic chains
- Replies: 10
- Views: 11456
Re: finite open, finite periodic and infinite periodic chains
Newbie in TeNPy, thanks for this great py-package. :D Following above discussion, by setting "bc_x=periodic" and "order="folded"", I have tried sucessfully building a CouplingMPOModel and checking the coupling terms by the code snippet Johanes given. print("order:&...