Two-Dimensional Double-Quantum Spectra Reveal Collective Resonances in an Atomic Vapor

被引：90

作者：

Dai, Xingcan ^{[1
,2
]}

Richter, Marten ^{[3
]}

Li, Hebin ^{[1
,2
]}

Bristow, Alan D. ^{[1
,2
]}

Falvo, Cyril ^{[3
]}

Mukamel, Shaul ^{[3
]}

Cundiff, Steven T. ^{[1
,2
]}

机构：

[1] Univ Colorado, JILA, Boulder, CO 80309 USA

[2] Natl Inst Stand & Technol, Boulder, CO 80309 USA

[3] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 19期

基金：

美国国家科学基金会;

关键词：

FOURIER-TRANSFORM SPECTROSCOPY; INFRARED-SPECTROSCOPY; LIGHT;

D O I：

10.1103/PhysRevLett.108.193201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of double-quantum coherence signals in a gas of potassium atoms at twice the frequency of the one-quantum coherences. Since a single atom does not have a state at the corresponding energy, this observation must be attributed to a collective resonance involving multiple atoms. These resonances are induced by weak interatomic dipole-dipole interactions, which means that the atoms cannot be treated in isolation, even at a low density of 10(12) cm(-3).

引用

页数：5

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