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arXiv 0812.0079cond-mat.stat-mechcond-mat.other
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玻色-爱因斯坦凝聚体中的杂质晶体

Impurity crystal in a Bose-Einstein condensate

David C. Roberts, Sergio Rica

摘要:

我们研究了在1维、2维和3维空间中,杂质场浸没在更大的凝聚场中的行为。我们讨论了凝聚体中单个杂质场的局域化,并注意到表面能的影响。我们推导出的功能形式的两个杂质之间的吸引力的相互作用,由于调解从凝聚。推广到$N$杂质场的分析,我们表明,在各种参数制度的杂质场的晶体可以自发地形成在冷凝。最后,冷凝物和结晶杂质结构的系统被证明具有非经典的转动惯量,这是超流性的特征,即可以看到该系统表现出超固体行为。

英文摘要:

We investigate the behavior of impurity fields immersed in a larger condensate field in 1, 2, and 3 dimensions. We discuss the localization of a single impurity field within a condensate and note the effects of surface energy. We derive the functional form of the attractive interaction between two impurities due to mediation from the condensate. Generalizing the analysis to $N$ impurity fields, we show that within various parameter regimes a crystal of impurity fields can form spontaneously in the condensate. Finally, the system of condensate and crystallized impurity structure is shown to have nonclassical rotational inertia, which is characteristic of superfluidity, i.e. the system can be seen to exhibit supersolid behavior.

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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