Work

A modular implementation of an effective interaction approach for harmonically trapped fermions in 1D

Year: 2023

Type: article

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.

Source: SciPost Physics Codebases

DOI: 10.21468/scipostphyscodeb.12

Authors: Lukas Rammelmüller, David Huber, Artem G. Volosniev

Institutions: Munich Center for Quantum Science and Technology, Technische Universität Darmstadt, Institute of Science and Technology Austria

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: European Commission, Deutsche Forschungsgemeinschaft, Seventh Framework Programme, Horizon 2020