Quantum systems of ultracold bosons with customized interparticle interactions
Quantum systems of ultracold bosons with customized interparticle interactions
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具有定制粒子间相互作用的超冷玻色子量子系统
DOI：
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发表时间：
2013
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通讯作者：
A. Streltsov
中科院分区：
文献类型：
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作者：
A. Streltsov
最近在冷却和捕获铬$^{52}Cr$、镝$^{164}Dy$和铒$^{168}Er$的极化云方面的进展为量子系统开辟了一条道路，在量子系统中，粒子间相互作用的形状可以定制。这项工作的主要目的是得到一个更深入的了解粒子间相互作用的整体形状在被困超冷玻色子的背景下发挥的作用。我们发现，强粒子间排斥不可避免地导致多峰碎裂的基态。碎片化现象是普遍的-它发生在不同维度和拓扑结构的陷阱中，并适用于非常广泛的排斥性粒子间势。背后的物理原理被识别和解释。
Recent progress in cooling and trapping of polarized clouds of chromium $^{52}Cr$, dysprosium $^{164}Dy$ and erbium $^{168}Er$ opens a road-map to quantum systems where shapes of inter-particle interactions can be customized. The main purpose of this work is to get a deeper insight on a role which the overall shape of the inter-particle interaction plays in a context of trapped ultra-cold bosons. We show that strong inter-particle repulsion inevitably leads to multi-hump fragmentation of the ground state. The fragmentation phenomenon is universal -- it takes place in traps of different dimensionality and topologies and for very broad classes of repulsive inter-particle potentials. The physics behind is identified and explained.