Search found 4 matches
- 30 Mar 2022, 06:08
- Forum: HowTos and FAQ for TeNPy
- Topic: iDMRG sweep schedule
- Replies: 3
- Views: 4502
Re: iDMRG sweep schedule
Thanks for the nice explanation! Now I roughly understand how idmrg is implemented in tenpy. I have two further questions: 1. For idmrg, after 10 sweeps (which is the default value of 'N_sweeps_check') with optimization, 5 more sweeps without optimization are performed. Since each sweep enlarge the ...
- 09 Mar 2022, 11:24
- Forum: HowTos and FAQ for TeNPy
- Topic: iDMRG sweep schedule
- Replies: 3
- Views: 4502
iDMRG sweep schedule
Hello, I am trying to read your implementation of iDMRG and got confused about how you do sweeps and update left and right environments. For a unit cell of 4 spins, let's say, I can see for one round the code uses updating rules like (true,true)X2, (true,false)X2, (true,true)X2, (false, true)X2. Cou...
- 30 Mar 2021, 03:12
- Forum: HowTos and FAQ for TeNPy
- Topic: Get excited states in different symmetry sectors
- Replies: 3
- Views: 2680
Re: Get excited states in different symmetry sectors
Thanks a lot for the reply. I did a few tests, it's exactly as what you said. But I found using single site DMRG gives me wrong results. Can you explain why it is so? See the code below. def test_dmrg_excited(eps=1.e-12): L, g = 8, 1.3 bc = 'finite' model_params = dict(L=L, J=1., g=g, bc_MPS=bc, con...
- 29 Mar 2021, 19:28
- Forum: HowTos and FAQ for TeNPy
- Topic: Get excited states in different symmetry sectors
- Replies: 3
- Views: 2680
Get excited states in different symmetry sectors
Hello,
While I was looking at the function test_dmrg_excited in test_dmry.py, I noticed the excited states searched by tenpy are all in the same symmetry sector.
I wonder if there is a way to get excited states in other symmetry sectors with tenpy?
While I was looking at the function test_dmrg_excited in test_dmry.py, I noticed the excited states searched by tenpy are all in the same symmetry sector.
I wonder if there is a way to get excited states in other symmetry sectors with tenpy?