Observation of Quantum Droplets in a Strongly Dipolar Bose Gas
Observation of Quantum Droplets in a Strongly Dipolar Bose Gas
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DOI：
10.1103/physrevlett.116.215301
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发表时间：
2016-05-23
影响因子：
8.6
通讯作者：
Pfau, Tilman
中科院分区：
文献类型：
--
作者：
Ferrier-Barbut, Igor;Kadau, Holger;Pfau, Tilman
量子涨落是真正的量子多体效应的起源，在经典平均场现象中可以忽略。在这里，我们报告的观察稳定的量子液滴包含类似的800个原子，预计崩溃的平均场水平，由于本质上的吸引力的相互作用。通过对单个液滴的系统测量，我们定量地证明了量子涨落在机械上使它们稳定，从而防止平均场崩溃。此外，我们还观察到几个液滴的干涉，表明这种稳定的多体状态是相位相干的。
Quantum fluctuations are the origin of genuine quantum many-body effects, and can be neglected in classical mean-field phenomena. Here, we report on the observation of stable quantum droplets containing similar to 800 atoms that are expected to collapse at the mean-field level due to the essentially attractive interaction. By systematic measurements on individual droplets we demonstrate quantitatively that quantum fluctuations mechanically stabilize them against the mean-field collapse. We observe in addition the interference of several droplets indicating that this stable many-body state is phase coherent.