2016/12/31 by Alexander Rokash, E. Epelbaum, Evgeny Epelbaum +3
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Fermion #Lattice (music) #Nuclear physics research studies #Physics #Quantum #Quantum mechanics #Quantum, superfluid, helium dynamics #cond-mat.quant-gas #hep-lat #nucl-th #quant-ph
paper · pdf · doi:10.1103/physrevlett.118.232502
published as Phys. Rev. Lett. 118, 232502 (2017) · Final version to be published in Physical Review Letters. Main text: 5 pages, 5 figures. Supplemental material: 2 pages, 2 figures
arxiv created 2017/05/11 · openalex publication_date 2017/06/09 · arxiv updated 2017/06/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Recent ab initio lattice studies have found that the interactions between alpha particles (4He nuclei) are sensitive to seemingly minor details of the nucleon-nucleon force, such as interaction locality. In order to uncover the essential physics of this puzzling phenomenon without unnecessary complications, we study a simple model involving two-component fermions in one spatial dimension. We probe the interaction between two bound dimers for several different particle-particle interactions and measure an effective potential between the dimers using external point potentials which act as numerical tweezers. We find that the strength and range of the local part of the particle-particle interactions play a dominant role in shaping the interactions between the dimers and can even determine the overall sign of the effective potential.