Suppression of Zeeman relaxation in cold collisions of 2P1/2 atoms

被引：10

作者：

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

Buchachenko, A. A. ^{[3
]}

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

Lu, M. -J. ^{[4
]}

Weinstein, J. D. ^{[4
]}

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] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

[4] Univ Nevada, Dept Phys, Reno, NV 89557 USA

来源：

PHYSICAL REVIEW A | 2009年 / 80卷 / 04期

关键词：

ab initio calculations; atom-atom collisions; atomic forces; gallium; helium neutral atoms; indium; magnetic traps; Zeeman effect; POTENTIAL-ENERGY CURVES; HYPERFINE-STRUCTURE; ULTRACOLD ATOMS; BASIS-SETS; PSEUDOPOTENTIALS; COHERENCE; HE;

D O I：

10.1103/PhysRevA.80.040701

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a combined experimental and theoretical study of angular momentum depolarization in cold collisions of P-2 atoms in the presence of an external magnetic field. We show that collision-induced Zeeman relaxation of Ga(P-2(1/2)) and In(P-2(1/2)) atoms in cold He-4 gas is dramatically suppressed compared to atoms in P-2(3/2) states. Using rigorous quantum-scattering calculations based on ab initio interaction potentials, we demonstrate that Zeeman transitions in collisions of atoms in P-2(1/2) electronic states occur via couplings to the P-2(3/2) state induced by the anisotropy of the interaction potential. Our results suggest the feasibility of sympathetic cooling and magnetic trapping of P-2(1/2)-state atoms, such as halogens, thereby opening up exciting areas of research in precision spectroscopy and cold-controlled chemistry.

引用

页数：4

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