Binding between two-component bosons in one dimension

Details Binding between two-component bosons in one dimension Binding between two-component bosons in one dimension

2009-02-26

arxiv.org/abs/0902.4655v3

New J. Phys. 11, 073015 (2009)

Physics

Condensed Matter

Other Condensed Matter

10 pages, 10 figures

Scientific paper

10.1088/1367-2630/11/7/073015

We investigate the ground state of one-dimensional few-atom Bose-Bose mixtures under harmonic confinement throughout the crossover from weak to strong inter-species attraction. The calculations are based on the numerically exact multi-configurational time-dependent Hartree method. For repulsive components we detail the condition for the formation of a molecular Tonks-Girardeau gas in the regime of intermediate inter-species interactions, and the formation of a molecular condensate for stronger coupling. Beyond a critical inter-species attraction, the system collapses to an overall bound state. Different pathways emerge for unequal particle numbers and intra-species interactions. In particular, for mixtures with one attractive component, this species can be viewed as an effective potential dimple in the trap center for the other, repulsive component.

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