Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-03-12
Phys.Rev. A62 (2000) 032504
Physics
Nuclear Physics
Nuclear Theory
12 pages, RevTeX, 5 Figures in tex included
Scientific paper
10.1103/PhysRevA.62.032504
We estimate the ratio $R=g_{3}/g_{2}$ of the critical coupling constants $g_{2}$ and $g_{3}$ which are required to achieve binding of 2 or 3 bosons, respectively, with a short-range interaction, and examine how this ratio depends on the shape of the potential. Simple monotonous potentials give $R\simeq 0.8$. A wide repulsive core pushes this ratio close to R=1. On the other hand, for an attractive well protected by an external repulsive barrier, the ratio approaches the rigorous lower bound $R=2/3$. We also present results for N=4 bosons, sketch the extension to $N>4$, and discuss various consequences.
Fleck Sonia
Krikeb Ali
Moszkowski Steven
Richard Jean-Marc
Theußl Lukas
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