Adiabatic passage in an open multilevel system

被引：9
作者：
Chalupczak, W [1 ]
Szymaniec, K [1 ]
机构：
[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England
来源：
PHYSICAL REVIEW A | 2005年 / 71卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.71.053410
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The preparation of a sample of ultra cold caesium atoms in an m(F)=0 Zeeman sublevel of the F=3 ground state is demonstrated, using cooling in an optical lattice and adiabatic passage. 97% of the atoms finally detected in the experiment populate the m(F)=0 sublevel at a temperature of 300 nK. Microwave spectroscopy is used to measure the adiabatic transfer directly and its dependence on various experimental parameters. A theoretical model is provided to estimate the upper limit for the efficiency of adiabatic transfer in a multilevel system with nonresonant excitation. The results constitute significant progress towards constructing a caesium fountain frequency standard operating in the nK temperature range.
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页数：7
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