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arXiv · 0911.1722

Universality of Brunnian ($N$-body Borromean) four and five-body systems

M. T. Yamashita·D. V. Fedorov·A. S. Jensen
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Abstract

We compute binding energies and root mean square radii for weakly bound systems of $N=4$ and $5$ identical bosons. Ground and first excited states of an $N$-body system appear below the threshold for binding the system with $N-1$ particles. Their root mean square radii approach constants in the limit of weak binding. Their probability distributions are on average located in non-classical regions of space which result in universal structures. Radii decrease with increasing particle number. The ground states for more than five particles are probably non-universal whereas excited states may be universal.

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M. T. Yamashita, D. V. Fedorov, A. S. Jensen. 2010-06-09. Universality of Brunnian ($N$-body Borromean) four and five-body systems. https://doi.org/10.1103/physreva.81.063607

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