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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 Volosniev
Submission information
Preprint Link:  (pdf)
Code repository:
Data repository:
Date accepted: 2023-01-17
Date submitted: 2022-11-18 08:07
Submitted by: Rammelmüller, Lukas
Submitted to: SciPost Physics Codebases
Ontological classification
Academic field: Physics
  • Atomic, Molecular and Optical Physics - Theory
Approaches: Theoretical, Computational


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)

Reports on this Submission

Report 2 by Tim Keller on 2022-11-25 (Invited Report)


The authors have appropriately addressed all requested changes as well as the general comments and therefore I recommend publication of the current version.

  • validity: -
  • significance: -
  • originality: -
  • clarity: -
  • formatting: -
  • grammar: -

Anonymous Report 1 on 2022-11-22 (Invited Report)


The authors responded well to most of my previous specific comments.

My general comments, however, were not addressed, and I would like to know the authors response.

Anyway, I recommended the current version for publication.

  • validity: top
  • significance: high
  • originality: high
  • clarity: high
  • formatting: excellent
  • grammar: excellent

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