Comparison of renormalized interactions using one-dimensional few-body systems as a testbed

• Published in: arXiv.org
• Main Authors: Brauneis, Fabian, Hammer, Hans-Werner, Reimann, Stephanie M, Volosniev, Artem G
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 19.08.2024
• Subjects: Configuration interaction; Convergence; Coupling; Energy spectra; Fermions; Harmonic oscillators; Regularization

Even though the one-dimensional contact interaction requires no regularization, renormalization methods have been shown to improve the convergence of numerical ab initio calculations considerably. In this work, we compare and contrast these methods: `the running coupling constant' where the two...