Reaching Fermi Degeneracy via Universal Dipolar Scattering

被引：166

作者：

Aikawa, K. ^{[1
,2
]}

Frisch, A. ^{[1
,2
]}

Mark, M. ^{[1
,2
]}

Baier, S. ^{[1
,2
]}

Grimm, R. ^{[1
,2
,3
]}

Ferlaino, F. ^{[1
,2
]}

机构：

[1] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria

[2] Univ Innsbruck, Zentrum Quantenphys, A-6020 Innsbruck, Austria

[3] Austrian Acad Sci, Inst Quantenopt & Quanteninformat, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 01期

基金：

欧洲研究理事会; 奥地利科学基金会;

关键词：

COLLISIONS; DEUTERIUM;

D O I：

10.1103/PhysRevLett.112.010404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the creation of a degenerate dipolar Fermi gas of erbium atoms. We force evaporative cooling in a fully spin-polarized sample down to temperatures as low as 0.2 times the Fermi temperature. The strong magnetic dipole-dipole interaction enables elastic collisions between identical fermions even in the zero-energy limit. The measured elastic scattering cross section agrees well with the predictions from the dipolar scattering theory, which follow a universal scaling law depending only on the dipole moment and on the atomic mass. Our approach to quantum degeneracy proceeds with very high cooling efficiency and provides large atomic densities, and it may be extended to various dipolar systems.

引用

页数：5

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