Yrast line for weakly interacting trapped bosons

被引:110
作者
Bertsch, GF [1 ]
Papenbrock, T [1 ]
机构
[1] Univ Washington, Inst Nucl Theory, Dept Phys, Seattle, WA 98195 USA
关键词
D O I
10.1103/PhysRevLett.83.5412
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We compute numerically the yrast line for harmonically trapped N-boson systems with a weak repulsive contact interaction, studying the transition to a vortex state as the angular momentum L increases and approaches N. There is a smooth crossover between low and high L. with no indication of a quantum phase transition; at L = N there is a kink in the slope of the spectrum. Most strikingly, the energy and wave function appear to be analytical functions of L over the entire range 2 less than or equal to L less than or equal to N. We confirm the structure of low-L states proposed by Mottelson as mainly single-particle excitations with two or three units of angular momentum.
引用
收藏
页码:5412 / 5414
页数:3
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