Search found 32 matches

by QichengTang
17 Jan 2019, 06:56
Forum: HowTos and FAQ for TeNPy
Topic: the truncation in dmrg
Replies: 5
Views: 1793

Re: the truncation in dmrg

Thanks for your reply, I know that the problem maybe the degeneracy of the ground state, but that's not my point. My point is, I thought only one of these parameters "svd_min", "trunc_err", "max_bond" for truncation works. I mean I thought there is a protocol to choose the minimal requirement of the...
by QichengTang
08 Jan 2019, 03:36
Forum: HowTos and FAQ for TeNPy
Topic: the truncation in dmrg
Replies: 5
Views: 1793

the truncation in dmrg

I think the following finding should be noticed by everyone who uses tenpy. When I run dmrg for xxz chian, I found that the result will be strongly dependents on the parameter "svd_min", and this doesn't make sense. I have run the following test to show the problem. I'm confused, what may cause this...