Search found 4 matches
- 31 Jan 2020, 20:26
- Forum: HowTos and FAQ for TeNPy
- Topic: Convergence issues in XXZ model with increasing bond dimension
- Replies: 3
- Views: 5631
Re: Convergence issues in XXZ model with increasing bond dimension
It appears to have been the same issue brought up in Issue #95. Using an updated version of tenpy makes the convergence much better. (Just to be certain, your comment on update_env = 0 was to diagnose the issue, not something one should do in general, yes? Since as I understand, in the case where up...
- 29 Jan 2020, 11:29
- Forum: HowTos and FAQ for TeNPy
- Topic: Convergence issues in XXZ model with increasing bond dimension
- Replies: 3
- Views: 5631
Convergence issues in XXZ model with increasing bond dimension
I noticed some odd behavior when I tried to simulate the XXZ model with tenpy. For reference, the Hamiltonian I am using is H = -J\sum_{i=1}^L (S^x_i S^x_{i+1} + S^y_i S^y_{i+1} + v S^z_i S^z_{i+1}) When I sweep through v at a low bond dimension (plotting the correlation length), I see good converge...
- 14 Jan 2020, 10:20
- Forum: HowTos and FAQ for TeNPy
- Topic: Preparing state with specified particle filling
- Replies: 4
- Views: 8221
Re: Preparing state with specified particle filling
That makes complete sense, thanks!
- 08 Dec 2019, 11:13
- Forum: HowTos and FAQ for TeNPy
- Topic: Preparing state with specified particle filling
- Replies: 4
- Views: 8221
Preparing state with specified particle filling
Hi all, I'm interested in properties of a state in the Bose Hubbard model at different values of the chemical potential. To speed up the computation, my thought was to set the chemical potential, run dmrg and find the ground state, read out the expected filling, then construct a new state with that ...