光子玻色-爱因斯坦统计的光谱检验
Spectroscopic test of Bose-Einstein statistics for photons
摘要：
利用玻色-爱因斯坦禁带双光子激发钡原子，我们限制了违反光子禁带跃迁的速率，作为等效光子禁带允许跃迁速率的一个分数$ν$，在90%的置信水平下为$ν<4.0\times10^{-11}$。这比以前的最佳结果提高了三个数量级以上。此外，超精细相互作用使禁戒过渡已被观察到，据我们所知，第一次。
英文摘要：
Using Bose-Einstein-statistics-forbidden two-photon excitation in atomic barium, we have limited the rate of statistics-violating transitions, as a fraction $ν$ of an equivalent statistics-allowed transition rate, to $ν<4.0\times10^{-11}$ at the 90% confidence level. This is an improvement of more than three orders of magnitude over the best previous result. Additionally, hyperfine-interaction enabling of the forbidden transition has been observed, to our knowledge, for the first time.
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