We study the trapping of a ground-state cesium atom in a small region around the midpoint between two coupled identical parallel optical nanofibers. We suggest using a blue-detuned guided light field in the odd ${\mathcal{E}}_z$-sine array mode to produce an optical potential with a local minimum of exactly zero at the midpoint between the nanofibers. We find that the effects of the van der Waals potential on the total trapping potential around the minimum point are not significant when the fiber separation distance and the power of the guided light field are large. For appropriate realistic parameters, a net trapping potential with a significant depth of about 1 mK, a large scattering-limited coherence time of several seconds, and a large recoil-heating-limited trap lifetime of several hours can be obtained. We investigate the dependencies of the trapping potential on the power of the guided light field, the fiber radius, the wavelength of light, and the fiber separation distance.

中文翻译：

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两个耦合的相同平行光学纳米纤维之间中点附近原子的光阱

我们研究了在两个耦合的相同平行光学纳米纤维之间的中点周围的小区域中捕获基态铯原子。我们建议在奇数中使用蓝色失谐引导光场${\mathcal{乙}}_z$-正弦阵列模式以在纳米纤维之间的中点产生局部最小值恰好为零的光势。我们发现，当光纤间隔距离和导光场功率较大时，范德华势对最小点周围总俘获势的影响不显着。对于适当的现实参数，可以获得具有约 1 mK 显着深度的净捕获势、几秒的大散射限制相干时间和几小时的大反冲加热限制陷阱寿命。我们研究了捕获势对引导光场功率、光纤半径、光波长和光纤分离距离的依赖性。