Universal Five- and Six-Body Droplets Tied to an Efimov Trimer

Details Universal Five- and Six-Body Droplets Tied to an Efimov Trimer Universal Five- and Six-Body Droplets Tied to an Efimov Trimer

2011-06-12

arxiv.org/abs/1106.2319v1

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures

Scientific paper

We explore the properties of weakly bound bosonic states in the strongly interacting regime. Combining a correlated-Gaussian (CG) basis set expansion with a complex scaling method, we extract the energies and structural properties of bosonic cluster states with $N\le6$ for different two-body potentials. The identification of five- and six-body resonances attached to an excited Efimov trimer provides strong support to the premise of Efimov universality in bosonic systems. Our study also reveals a rich structure of bosonic cluster states. Besides the lowest cluster states which behave as bosonic droplets, we identify cluster states weakly bound to one or two atoms forming effective cluster-atom "dimers" and cluster-atom-atom "trimers." The experimental signatures of these cluster states are discussed.

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