Breakdown of the mean field for dark solitons of dipolar bosons in a one-dimensional harmonic trap
arXiv:1911.09523 · doi:10.1103/PhysRevResearch.2.023386
Abstract
We directly compare the mean-field and the many-body approach in a one-dimensional Bose system in a harmonic trap. Both contact and dipolar interactions are considered. We propose a multi-atom version of the phase imprinting method to generate dark solitons in the system. We begin with a general analysis of system dynamics and observe the emergence of a dark soliton and a shock wave. Center of mass and soliton motion become decoupled because the shock wave oscillates with the trap frequency and soliton does not. A detailed investigation of frequencies reveals significant differences between results obtained in the mean-field and the many-body pictures.
arXiv comment6 pages, 3 figures, any comments welcome
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