Lossless State Detection of Single Neutral Atoms

被引：71

作者：

Bochmann, J. ^{[1
]}

Muecke, M. ^{[1
]}

Guhl, C. ^{[1
]}

Ritter, S. ^{[1
]}

Rempe, G. ^{[1
]}

Moehring, D. L. ^{[1
]}

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 20期

关键词：

MANIPULATION; CAVITY;

D O I：

10.1103/PhysRevLett.104.203601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce lossless state detection of trapped neutral atoms based on cavity-enhanced fluorescence. In an experiment with a single (87)Rb atom, a hyperfine-state-detection fidelity of 99.4% is achieved in 85 mu s. The quantum bit is interrogated many hundreds of times without loss of the atom while a result is obtained in every readout attempt. The fidelity proves robust against atomic frequency shifts induced by the trapping potential. Our scheme does not require strong coupling between the atom and cavity and can be generalized to other systems with an optically accessible quantum bit.

引用

页数：4

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