期刊
SCIENCE
卷 348, 期 6234, 页码 551-555出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaa5601
关键词
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资金
- Reinhart Koselleck project of the Deutsche Forschungsgemeinschaft
- Goethe-University Frankfurt am Main
- U.S. National Science Foundation [PHY-1205443]
- Division Of Physics
- Direct For Mathematical & Physical Scien [GRANTS:13867911, 1205443] Funding Source: National Science Foundation
Quantum theory dictates that upon weakening the two-body interaction in a three-body system, an infinite number of three-body bound states of a huge spatial extent emerge just before these three-body states become unbound. Three helium (He) atoms have been predicted to form a molecular system that manifests this peculiarity under natural conditions without artificial tuning of the attraction between particles by an external field. Here we report experimental observation of this long-predicted but experimentally elusive Efimov state of He-4(3) by means of Coulomb explosion imaging. We show spatial images of an Efimov state, confirming the predicted size and a typical structure where two atoms are close to each other while the third is far away.
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