Collision-induced spin depolarization of alkali-metal atoms in cold 3He gas

被引：15

作者：

Tscherbul, T. V. ^{[1
,2
]}

Zhang, P. ^{[2
]}

Sadeghpour, H. R. ^{[2
]}

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

Brahms, N. ^{[1
,3
]}

Au, Y. S. ^{[1
,3
]}

Doyle, J. M. ^{[1
,3
]}

机构：

[1] Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA

[2] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom Mol & Opt Phys, Cambridge, MA 02138 USA

[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW A | 2008年 / 78卷 / 06期

关键词：

atom-atom collisions; helium; lithium; magnetic traps; potassium; quantum optics; quantum theory; radiation pressure;

D O I：

10.1103/PhysRevA.78.060703

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a joint experimental and theoretical study of spin depolarization in collisions of alkali-metal atoms with He-3 in a magnetic field. A rigorous quantum theory for spin-changing transitions is developed and applied to calculate the spin exchange and spin relaxation rates of Li and K atoms in cryogenic He-3 gas. Magnetic trapping experiments provide upper bounds to the spin exchange rates for Li-He-3 and K-He-3, which are in agreement with the present theory. Our calculations demonstrate that the alkali-metal atoms have extremely slow spin depolarization rates, suggesting a number of potential applications in precision spectroscopy and quantum optics.

引用

页数：4

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