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arXiv 1306.1266cond-mat.mes-hall
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介观偶极量子晶体

Mesoscopic dipolar quantum crystals

Massimo Boninsegni

摘要:

用计算机模拟方法研究了由30个极性分子组成的二维介观简谐约束组装体的基态。随着束缚阱强度的增加,团簇从超流演化为超固体,再演化为绝缘晶体。对于强约束,可以基于经典能量学来预测晶体结构。然而,特定数量的颗粒的簇(即,N=12和N=19)显示出{ \it非经典晶体结构},通过量子效应稳定,在中等范围的限制强度。在这些情况下,在有限的温度下观察到量子和经典的晶体配置的共存。

英文摘要:

The ground state of a two-dimensional, harmonically confined mesoscopic assembly of up to thirty polar molecules is studied by computer simulations. As the strength of the confining trap is increased, clusters evolve from superfluid, to supersolid, to insulating crystals. For strong confinement, the crystalline structure can be predicted based on classical energetics. However, clusters of specific numbers of particles (i.e., N=12 and N=19) display a {\it non-classical crystalline structure}, stabilized by quantum effects, in an intermediate range of confinement strength. In these cases, coexistence of quantum and classical crystalline configurations is observed at finite temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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