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Yrast line for weakly interacting trapped bosons | | George F. Bertsch
; Thomas Papenbrock
; | | Date: |
13 Aug 1999 | | Journal: | Phys.Rev.Lett. 83 (1999) 5412 | | Subject: | Condensed Matter; Atomic Physics | cond-mat nucl-th physics.atom-ph | | Affiliation: | Institute for Nuclear Theory, Seattle, USA | | Abstract: | We compute numerically the yrast line for harmonically trapped boson systems with a weak repulsive contact interaction, studying the transition to a vortex state as the angular momentum L increases and approaches N, the number of bosons. The L=N eigenstate is indeed dominated by particles with unit angular momentum, but the state has other significant components beyond the pure vortex configuration. There is a smooth crossover between low and high L with no indication of a quantum phase transition. Most strikingly, the energy and wave function appear to be analytical functions of L over the entire range 2 < L < 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. | | Source: | arXiv, cond-mat/9908189 | | Services: | Forum | Review | PDF | Favorites | |
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