Search found 9 matches

by gunheepark0229
03 Jun 2020, 03:51
Forum: HowTos and FAQ for TeNPy
Topic: tebd on 2d lattice/ MPS with dangling legs
Replies: 2
Views: 526

Re: tebd on 2d lattice/ MPS with dangling legs

Thanks so much, Johannes! The point you understood was exactly correct. Indeed, I was having a look at the paper that you made a reference. I was imagining the current TEBD can be reused to apply TEBD to the canonical PEPS state, but as you have done with new Purification TEBD, I might need a new TE...
by gunheepark0229
31 May 2020, 12:03
Forum: HowTos and FAQ for TeNPy
Topic: tebd on 2d lattice/ MPS with dangling legs
Replies: 2
Views: 526

tebd on 2d lattice/ MPS with dangling legs

Hi! I am considering the problems of how to apply tebd on 2d lattices. My thought was to cut the 1d segments of 2d lattices and apply tebd on it. On implementing this idea, I have one problem. On constructing MPS states from these 1d segments, we have dangling legs across MPS states, vUP and vDOWN. ...
by gunheepark0229
22 May 2020, 12:47
Forum: HowTos and FAQ for TeNPy
Topic: Initializing RenyiDisentangler
Replies: 2
Views: 626

Re: Initializing RenyiDisentangler

Maybe I can copy and paste the source code to define my own function that can be used without tebd class :)
by gunheepark0229
22 May 2020, 12:45
Forum: Algorithms
Topic: Algorithm for Gradient Descent Disentangler
Replies: 0
Views: 664

Algorithm for Gradient Descent Disentangler

Hi! I was checking the documents for the Gradient Descent Disentangler, and I had some concepts that I cannot understand. The document says dS = {\partial S(Utheta,n)} / {\partial U} R[i] is given by {\partial S(Y,n)} / {\partial Y_i} The point I cannot understand is how dS is given by: | .----X--R-...
by gunheepark0229
21 May 2020, 15:13
Forum: HowTos and FAQ for TeNPy
Topic: Initializing RenyiDisentangler
Replies: 2
Views: 626

Initializing RenyiDisentangler

Hi! I was trying to use RenyiDisentangler class. The parameter on the initialization is the 'parent', which is the tebd.Engine. However, in my case, I did now want to run the tebd algorithm, but only wanted to get the disentangler in the end. I think I do not need tebd for the disentangler, as I rea...
by gunheepark0229
17 May 2020, 15:49
Forum: HowTos and FAQ for TeNPy
Topic: Error at example code c_tebd.py
Replies: 1
Views: 738

Error at example code c_tebd.py

At the function example_TEBD_gs_tf_ising_infinite, the energy per site is calculated as

E = np.sum(M.bond_energies(psi))

I think you missed 1/2 here.
It can be clearly seen at the final results on the relative error.
by gunheepark0229
16 May 2020, 02:47
Forum: HowTos and FAQ for TeNPy
Topic: npc.zeros and labels
Replies: 2
Views: 890

Re: npc.zeros and labels

I see the difference!

Thanks Johannes
by gunheepark0229
15 May 2020, 10:59
Forum: HowTos and FAQ for TeNPy
Topic: npc.zeros and labels
Replies: 2
Views: 890

npc.zeros and labels

Hi! I am now learning how to use the Tenpy library and I am now following the example code. At the first a_np_conserved.py code, I tried to execute it, but it showed an error. The error was at B_even = npc.zeros([v_leg_even, v_leg_odd.conj(), p_leg], label=['vL', 'vR', 'p']) # virtual left/right, ph...