SciPost Submission Page
A modular implementation of an effective interaction approach for harmonically trapped fermions in 1D
by Lukas Rammelmüller, David Huber, Artem G. Volosniev
Submission summary
| Authors (as registered SciPost users): | Lukas Rammelmüller · Artem G. Volosniev |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2202.04603v2 (pdf) |
| Code repository: | https://github.com/rammelmueller/FermiFCI.jl |
| Data repository: | https://github.com/rammelmueller/fermifci_data_repo |
| Date accepted: | Jan. 17, 2023 |
| Date submitted: | Nov. 18, 2022, 8:07 a.m. |
| Submitted by: | Lukas Rammelmüller |
| Submitted to: | SciPost Physics Codebases |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
We introduce a generic and accessible implementation of an exact diagonalization method for studying few-fermion models. Our aim is to provide a testbed for the newcomers to the field as well as a stepping stone for trying out novel optimizations and approximations. This userguide consists of a description of the algorithm, and several examples in varying orders of sophistication. In particular, we exemplify our routine using an effective-interaction approach that fixes the low-energy physics. We benchmark this approach against the existing data, and show that it is able to deliver state-of-the-art numerical results at a significantly reduced computational cost.
Published as SciPost Phys. Codebases 12 (2023) , SciPost Phys. Codebases 12-r1.0 (2023)