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

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

2011-06-28

arxiv.org/abs/1106.5604v2

Phys Rev A 85, 012703(2012)

Physics

Condensed Matter

Quantum Gases

8 pages, 6 figures, published version

Scientific paper

10.1103/PhysRevA.85.012703

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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