Bose-Bose mixtures in reduced dimensions
Bose-Bose mixtures in reduced dimensions
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DOI：
10.1088/1742-6596/264/1/012016
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发表时间：
2011-01
期刊：
影响因子：
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通讯作者：
F. Minardi;G. Barontini;J. Catani;G. Lamporesi;Y. Nishida;M. Inguscio
中科院分区：
文献类型：
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作者：
F. Minardi;G. Barontini;J. Catani;G. Lamporesi;Y. Nishida;M. Inguscio
两体散射在降维情况下得到了很大的改进。对于超冷原子，由于光学晶格的使用，低维构型通常是可获得的，光学晶格允许足够强的约束来冻结沿沿着选定方向的运动。对于两种不同的原子种类，我们使用驻波形式的种类选择光学势，仅将一种物质限制在2D盘中，并研究不同维度中存在的粒子之间的散射，即，我们实现了一个2D-3D的混合维结构，让人想起膜世界。我们回顾了这种配置的散射理论，并根据自由空间散射长度α和限制参数推导出有效散射长度αeff。我们在实验上检测到在特定的α值下非弹性碰撞的增强，并将这些值与αeff的发散联系起来。与对相同粒子预测和观察到的约束诱导共振不同，我们的混合维共振发生在一系列的几个共振中，因为相对运动和质心运动是耦合的。
The two-body scattering is greatly modified in reduced dimensions. With ultracold atoms, low dimensional configurations are routinely accessible thanks to the use of optical lattices which allow confinements sufficiently strong to freeze the motion along chosen directions. With two different atomic species, we use a species-selective optical potential, in the form of a standing wave, to confine only one species in 2D disks and study the scattering between particles existing in different dimensions, i.e., we realize a 2D-3D mix-dimensional configuration, reminiscent of a brane world. We review the scattering theory specific to this configuration and derive an effective scattering length αeff in terms of the free-space scattering length α and the confinement parameters. We detect experimentally the enhancement of inelastic collisions arising at particular values of α and relate these values to the divergences of αeff. Unlike the confinement-induced resonances predicted and observed for identical particles, our mixed-dimensional resonances occur in a series of several resonances, because the relative and centre-of-mass motion are coupled.