Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia

doi:10.1126/science.aba4309

GSTDTAP > 气候变化

DOI	10.1126/science.aba4309
	Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia
	L. Tanzi; J. G. Maloberti; G. Biagioni; A. Fioretti; C. Gabbanini; G. Modugno
	2021-03-12
发表期刊	Science
出版年	2021
英文摘要	When a bucket of water is rotated, the water rotates with the vessel, contributing to the total moment of inertia. If such an experiment were done with a superfluid, it would decouple from the vessel and would not contribute to rotation. Tanzi et al. studied an intermediate case, a supersolid, which is predicted to only partially decouple, resulting in a moment of inertia smaller than the classical value. Whereas previous such experiments were done with helium, the authors used a gas of highly magnetic dysprosium atoms in an optical trapping potential that was suddenly changed, causing the gas to oscillate. Measuring the frequency of these oscillations provides evidence for a reduced moment of inertia. Science , this issue p. [1162][1] A key manifestation of superfluidity in liquids and gases is a reduction of the moment of inertia under slow rotations. Nonclassical rotational effects have also been considered in the context of the elusive supersolid phase of matter, in which superfluidity coexists with a lattice structure. Here, we show that the recently discovered supersolid phase in dipolar quantum gases features a reduced moment of inertia. Using a dipolar gas of dysprosium atoms, we studied a peculiar rotational oscillation mode in a harmonic potential, the scissors mode, previously investigated in ordinary superfluids. From the measured moment of inertia, we deduced a superfluid fraction that is different from zero and of order of unity, providing direct evidence of the superfluid nature of the dipolar supersolid. [1]: /lookup/doi/10.1126/science.aba4309
领域	气候变化 ; 资源环境
URL	查看原文
引用统计	被引频次：55[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/318698
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	L. Tanzi,J. G. Maloberti,G. Biagioni,et al. Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia[J]. Science,2021.
APA	L. Tanzi,J. G. Maloberti,G. Biagioni,A. Fioretti,C. Gabbanini,&G. Modugno.(2021).Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia.Science.
MLA	L. Tanzi,et al."Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia".Science (2021).