2006/05/24 by Sascha Zöllner, Hans‐Dieter Meyer, Hans-Dieter Meyer +1 · 85 citations
Physics and Astronomy · #Atomic physics #Basis (linear algebra) #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Coupling strength #Fragmentation (computing) #Ground state #Harmonic #Modulation (music) #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #Trap (plumbing) #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physreva.74.053612
published in Physical Review A 74(5) (American Physical Society)
arxiv created 2006/05/24 · openalex publication_date 2006/11/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the transition of a quasi-one-dimensional few-boson system from a weakly correlated to a fragmented and finally a fermionized ground state. Our numerically exact analysis, based on a multiconfigurational method, explores the interplay between different shapes of external and interparticle forces. Specifically, we demonstrate that the addition of a central barrier to an otherwise harmonic trap may support the system's fragmentation, with a symmetry-induced distinction between even and odd atom numbers. Moreover, the impact of inhomogeneous interactions is studied, where the effective coupling strength is spatially modulated. It is laid out how the ground state can be displaced in a controlled way depending on the trap and the degree of modulation. We present the one- and two-body densities and, beyond that, highlight the role of correlations on the basis of the natural occupations.