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arXiv quant-ph/0612055quant-ph
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原子-光子对laser

An atom-photon pair laser

Thomas Salzburger, Helmut Ritsch

摘要:

在光学高$Q$谐振腔中研究了深光晶格中超冷原子气体的量子动力学。原子被相干地照射,腔共振被调谐到蓝色振动边带,使得光子散射到共振器模式伴随着原子的振动冷却。该系统表现出一个阈值以上的成对受激产生的腔光子和原子在最低的振动带占主导地位的自发散射,我们发现一个组合的光学激光与建立的宏观人口在最低的晶格带。包括基态原子的输出耦合和将热原子补充到腔体中,会产生一个相干的、量子相关的原子-光子对源,非常类似于非简并光学参量振荡器中双光束的产生。

英文摘要:

We study the quantum dynamics of an ultracold atomic gas in a deep optical lattice within an optical high-$Q$ resonator. The atoms are coherently illuminated with the cavity resonance tuned to a blue vibrational sideband, so that photon scattering to the resonator mode is accompanied by vibrational cooling of the atoms. This system exhibits a threshold above which pairwise stimulated generation of a cavity photon and an atom in the lowest vibrational band dominates spontaneous scattering and we find a combination of optical lasing with a buildup of a macroscopic population in the lowest lattice band. Including output coupling of ground-state atoms and replenishing of hot atoms into the cavity volume leads to a coherent, quantum correlated atom-photon pair source very analogous to twin light beam generation in a nondegenerate optical parametric oscillator.

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