Search found 2 matches

by Lukas
05 Feb 2020, 12:18
Forum: HowTos and FAQ for TeNPy
Topic: Problems with modelling a fermionic ladder
Replies: 3
Views: 107

Re: Problems with modelling a fermionic ladder

Thanks a lot! It works very well right know. Now I face the problem that in order to see the Ising-like phase transition I want to calculate the correlation function <\Psi_0 |T^y_i T^y_{i+r} |\Psi_0> with T^y_i= \frac{1}{2}(-i c^\dagger_{i,u}c_{i,d}+i c^\dagger_{i,d}c_{i,u}) where u and d are again ...
by Lukas
04 Feb 2020, 14:48
Forum: HowTos and FAQ for TeNPy
Topic: Problems with modelling a fermionic ladder
Replies: 3
Views: 107

Problems with modelling a fermionic ladder

Hello community. I had some problems with implementing my own model. The Hamiltonian I want do analyze with DMRG is \begin{equation} H= \sum_{i,l}(-t\, c^\dagger_{i+1,l}c_{i,\bar{l}}+i\,s_l \,t \,c^\dagger_{i+1,l}c_{i,l}+ H.c.)+\sum_{i,l} \frac{\Delta \epsilon}{2}s_l n_{i,l}+\sum_{i,l} \frac{V}{2}n_...