Degenerate Bose-Fermi mixture of metastable atoms

被引：79

作者：

McNamara, J. M. ^{[1
]}

Jeltes, T. ^{[1
]}

Tychkov, A. S. ^{[1
]}

Hogervorst, W. ^{[1
]}

Vassen, W. ^{[1
]}

机构：

[1] Vrije Univ Amsterdam, Ctr Laser, De Boelelaan 1081, NL-1081 HV Amsterdam, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.97.080404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of simultaneous quantum degeneracy in a dilute gaseous Bose-Fermi mixture of metastable atoms. Sympathetic cooling of helium-3 (fermion) by helium-4 (boson), both in the lowest triplet state, allows us to produce ensembles containing more than 10(6) atoms of each isotope at temperatures below 1 mu K, and achieve a fermionic degeneracy parameter of T/T-F=0.45. Because of their high internal energy, the detection of individual metastable atoms with subnanosecond time resolution is possible, permitting the study of bosonic and fermionic quantum gases with unprecedented precision. This may lead to metastable helium becoming the mainstay of quantum atom optics.

引用

页数：4

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