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arXiv 1002.3795cond-mat.quant-gascond-mat.other
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低维量子系统中的限制诱导共振

Confinement-Induced Resonances in Low-Dimensional Quantum Systems

Elmar Haller, Manfred J. Mark, Russell Hart, Johann G. Danzl, Lukas Reichsöllner, Vladimir Melezhik, Peter Schmelcher, Hanns-Christoph Nägerl

摘要:

我们报道了在强相互作用的量子气体系统中观察到的约束诱导共振,该系统具有一维和二维几何形状的可调相互作用。当s波散射长度接近与紧密横向限制相关的长度尺度时,原子-原子散射被大幅修改,导致特征损耗和加热签名。在引入各向异性的横向限制,我们观察到分裂的约束诱导共振。随着各向异性的增加,出现了额外的共振。在二维系统的极限中,我们发现一个共振持续存在。

英文摘要:

We report on the observation of confinement-induced resonances in strongly interacting quantum-gas systems with tunable interactions for one- and two-dimensional geometry. Atom-atom scattering is substantially modified when the s-wave scattering length approaches the length scale associated with the tight transversal confinement, leading to characteristic loss and heating signatures. Upon introducing an anisotropy for the transversal confinement we observe a splitting of the confinement-induced resonance. With increasing anisotropy additional resonances appear. In the limit of a two-dimensional system we find that one resonance persists.

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