Fluctuations in superfluorescence were evaluated for a CuCl quantum dot assembly in a NaCl single crystal by measuring single superfluorescent spectra. The distributions of the spectral widths and peak intensities of the individual spectra were obtained as a function of the excitation density. The result showed that fluctuations decrease with an increase in excitation density due to the rapid establishment of coherent coupling between the quantum dots, which suppresses the fluctuation in superfluorescence. Based on the results of our study, influences of quantum fluctuations on the generation of macroscopic coherence can be evaluated.

中文翻译：

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量子涨落对半导体量子点单次测量观察到的超荧光光谱的影响

通过测量单个超荧光光谱，评估了NaCl单晶中CuCl量子点组件的超荧光涨落。获得了各个光谱的光谱宽度和峰强度的分布，作为激发密度的函数。结果表明，由于快速建立了量子点之间的相干耦合，所以波动随着激发密度的增加而减小，从而抑制了超荧光的波动。根据我们的研究结果，可以评估量子涨落对宏观相干性产生的影响。