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Here is a minimal code:
```
using ITensorMPS
let
N = 10
sites = siteinds("S=1/2",N)
os = OpSum()
for j=1:N-1
os += 0.5,"S+",j,"S-",j+1
os += 0.5,"S-",j,"S+",j+1
…
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Below I'm leaving a snippet of my code that gives an error when placing the "weight" argument in the DMRG. This code works in previous versions of Itensors, but in recent versions it does not work
…
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Dear developers
I am a new user of autoCAS. I am using sharc OpenMolcas interface to study dynamics of reactions in excited states. Recently I have come to know about autoCAS and giving a try to wor…
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Verify that the hubbard finite DMRG works fine.
v1j4y updated
9 years ago
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**Describe the bug**
When running segment DMRG on main, we ran into the following bug:
```python
File "..../tenpy/algorithsms/dmrg.py", line 632, in post_update_local
self.update_segment_bou…
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### What is your issue?
Dear quimb team,
I am interested to compute the magnetization of 1D and 2D models by implementing dmrg method.
How can I do that? I searched throughout the quimb website b…
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1.The results obtained by DMRG-NEVPT2 are far from CASCI-NEVPT2
I want to calculate the NEVPT2 from a converged CASSCF calculation(16o,16e) by DMRG-NEVPT2 in order to save time , but I got a stran…
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Hello,
I am trying to build the OpenMOLCAS Fortran interface with the `BUILD_OPENMOLCAS_INTERFACE` option, but I get these errors:
```
/mnt/nvme/tmpscratch/root/spack-stage/spack-stage-scine-qcmaqu…
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**Description of bug**
The `@timeit_debug` decorator from `TimerOutputs` does not to seem to function properly as `timeit_debug_enabled` is not defined in `ITensors`. See also screenshot of README …
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Right now, the convention for setting `eigsolve` keyword arguments through DMRG is the following:
```julia
dmrg(H, psi0, sweeps;
eigsolve_tol = 1e-14,
eigsolve_krylovdim = 3,
eigso…