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arXiv · 1106.5604

Separation induced resonances in quasi-one-dimensional ultracold atomic gases

Wenbo Fu·Zhenhua Yu·Xiaoling Cui
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Abstract

We study the effective one-dimensional (1D) scattering of two distinguishable atoms confined individually by {\em separated} transverse harmonic traps. With equal trapping frequency for two s-wave interacting atoms, we find that by tuning the trap separations, the system can undergo {\em double} 1D scattering resonance, named as the separation induced resonance(SIR), when the ratio between the confinement length and s-wave scattering length is within $(0.791,1.46]$. Near SIR, the scattering property shows unique dependence on the resonance position. The universality of a many-body system on scattering branch near SIR is demonstrated by studying the interaction effect of a localized impurity coupled with a Fermi sea of light atoms in a quasi-1D trap.

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Wenbo Fu, Zhenhua Yu, Xiaoling Cui. 2012-01-16. Separation induced resonances in quasi-one-dimensional ultracold atomic gases. https://doi.org/10.1103/physreva.85.012703

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