Search found 7 matches

by DHIMAN002
01 Oct 2019, 08:43
Forum: HowTos and FAQ for TeNPy
Topic: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model
Replies: 6
Views: 1397

Re: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model

Hi Leon, I had tried single site DMRG. It is faster than two site DMRG. Because, my convergence problem is because of gapless ground state, so it can not help me. Thanks for your suggestions. I checked the single site and double site DMRG both gives the same results. But single site DMRG is much fas...
by DHIMAN002
14 Sep 2019, 09:29
Forum: HowTos and FAQ for TeNPy
Topic: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model
Replies: 6
Views: 1397

Re: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model

Hi Johannes,
Thank you so much for your reply. Your answers clarified many things.
I will ask you again, If I get into any problem.
Thanks a lot again. :D :D
by DHIMAN002
07 Sep 2019, 17:16
Forum: HowTos and FAQ for TeNPy
Topic: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model
Replies: 6
Views: 1397

Re: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model

I investigated more and found that the fluctuation of energy and entropy values after 10 sweeps(I fixed it) is changing for a certain parameter region of complex hopping amplitude above a critical value. But the code still works for complex hopping in parameter region less than a critical value, so ...
by DHIMAN002
06 Sep 2019, 09:50
Forum: HowTos and FAQ for TeNPy
Topic: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model
Replies: 6
Views: 1397

Re: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model

Sorry, I realized that WAY-II is wrong. The net imaginary hopping in WAY-II is zero. That is why I got same results for D=0 and D=finite. But, please suggest me, why WAY-I is giving fluctuating results after each sweep. One of my guess is given in the 2nd point in the NOTE, what I have mentioned. Th...
by DHIMAN002
06 Sep 2019, 04:52
Forum: HowTos and FAQ for TeNPy
Topic: iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model
Replies: 6
Views: 1397

iDMRG is not working properly with next-nearest neighbor complex hopping in the Haldane model

Hi everyone, I am trying to simulate a hard-bosonic Haldane model in the honeycomb lattice. The model is defined at Eq-2 of paper, 1603.04827 . I have created the nearest neighbor bonds and next-nearest neighbor bonds as in the following way in a "Lattice"-class, NN = [(0, 1, np.array([0, 0])), (0, ...
by DHIMAN002
26 Feb 2019, 11:36
Forum: HowTos and FAQ for TeNPy
Topic: Error drawing Lattice in Tenpy
Replies: 2
Views: 453

Re: Error drawing Lattice in Tenpy

Thanks a lot for ur help.
:D :D
by DHIMAN002
24 Feb 2019, 05:35
Forum: HowTos and FAQ for TeNPy
Topic: Error drawing Lattice in Tenpy
Replies: 2
Views: 453

Error drawing Lattice in Tenpy

I was experimenting to construct lattices using Tenpy and I found two errors, 1) ERROR IN FIGURE FOR SPECIFIC "PRIORITY" AND "SNAKE_WINDING": I made my own ordering function in Honeycomb lattice as: elif order=="user_order": priority=(1,2,0) snake_winding=(True,False,False) return get_order(self.sha...