TeNPy Forum

Hi, I am trying to run some DMRG simulations on a cluster. However, I eventually run out of memory. In the slurm file, I get the error: Traceback (most recent call last): File "/mmfs1/gscratch/.../conda_env/lib/python3.7/site-packages/tenpy/algorithms/dmrg.py", line 1831, in mix_rho_L LHef...

Hi, 1) In VAMPIRE, exchange coupling strengths are given in units of Joules/link (which end up being on the order of 10^-22). In the TenPy documentation, the values used in the documentation are numbers on the order of 1 (e.g., for add_coupling() ). Do the units matter? Can I just use values in meV?...

Hi, Would you mind clarifying how I can go about finding the magnetic ground state and magnetic order using TenPy and plotting the resulting spin structure? I started exploring TenPy's DMRG features, but am not sure how exactly to go about doing this. Naively, I would have thought that it is a matte...

Thank you for your response Johannes ! Would you mind clarifying the following? 1) Why do you add np.pi/6 to the array of angles? 2) If I specify anisotropic exchange J.S_i.S_j (Jxx,Jxy,Jxz,Jyx,Jyy,Jyz,Jzx,Jzy,Jzz) via add_coupling(), and my system has DMI too, will I need to specify DMI D separatel...

Johannes , thank you! That source code is very helpful. I think I understand how to deal with anisotropic J and single-ion anisotropy. However, I am lost regarding incorporating DMI. I have the DMI vector D = (Dx,Dy,Dz), and this vector is different depending on the spin site chosen. I have a trian...

Hi, Currently, I am able to run DMRG calculations for the CouplingMPOModel with isotropic exchange J parameters J1 and J2 for NN, and NNN using: def init_terms(self, model_params): J1 = model_params.get('J1', 1.0) J2 = model_params.get('J2', 0.0) for u1, u2, dx in self.lat.pairs['nearest_neighbors']...

Hi, I started using TeNPy just a few days ago, and I appreciate all the work being done on it. Please forgive me for the following long, beginner questions, but I wasn't sure where else to go to for help. 1) I want to use DMRG to find the magnetic ground state on a triangular lattice for a spin-1/2 ...