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arXiv 2202.08259cond-mat.quant-gas
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二元偶极凝聚体中超固相的催化作用

Catalyzation of supersolidity in binary dipolar condensates

D. Scheiermann, L. A. Peña Ardila, T. Bland, R. N. Bisset, L. Santos

摘要:

突破性的实验新探索了偶极量子液滴和超固体的迷人物理学。最近偶极混合物的实现开辟了进一步有趣的可能性。我们表明,在相当一般的条件下,第二个组件的存在下,催化液滴成核和超固体,否则未调制的冷凝。液滴催化在混溶混合物中,这可能会发生,即使是一个令人惊讶的小杂质掺杂,结果从一个本地的roton不稳定性引发的掺杂依赖的修改的有效偶极强度。催化机制可能会触发形成一个双流体超固体,其特征是通常不同的超流体分数的每一个组件,这打开了有趣的可能性,为未来的研究自旋物理学在偶极超固体。

英文摘要:

Breakthrough experiments have newly explored the fascinating physics of dipolar quantum droplets and supersolids. The recent realization of dipolar mixtures opens further intriguing possibilities. We show that under rather general conditions, the presence of a second component catalyzes droplet nucleation and supersolidity in an otherwise unmodulated condensate. Droplet catalyzation in miscible mixtures, which may occur even for a surprisingly small impurity doping, results from a local roton instability triggered by the doping-dependent modification of the effective dipolar strength. The catalyzation mechanism may trigger the formation of a two-fluid supersolid, characterized by a generally different superfluid fraction of each component, which opens intriguing possibilities for the future study of spin physics in dipolar supersolids.

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