Binding between two-component bosons in one dimension
Abstract
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.
Cite
@article{arxiv.0902.4655,
title = {Binding between two-component bosons in one dimension},
author = {Emmerich Tempfli and Sascha Zöllner and Peter Schmelcher},
journal= {arXiv preprint arXiv:0902.4655},
year = {2009}
}
Comments
10 pages, 10 figures