论文标题
超高的技巧增强光谱，以精确测试分子的量子电动力学测试
Ultra-high finesse cavity-enhanced spectroscopy for accurate tests of quantum electrodynamics for molecules
论文作者
论文摘要
我们报告了d $ _2 $中弱四极S（2）2-0线的位置的最准确测量。用频率稳定的空腔环形光谱仪（FS-CRD）收集光谱，具有超高的精美光腔（$ \ Mathcal {f} $ = 637 000），并在频率高速，快速扫描的频谱（FARS）模式下运行。尽管在多普勒有限的状态下工作，但我们达到了40 kHz的统计不确定性和161 kHz的绝对精度，达到了分子氢的同位素同位素学的最高准确性。我们的测量的准确性对应于QED校正中指数的第五个重要数字。我们观察到2.3 $σ$的差异具有最近的理论价值。
We report the most accurate measurement of the position of the weak quadrupole S(2) 2-0 line in D$_2$. The spectra were collected with a frequency-stabilized cavity ring-down spectrometer (FS-CRDS) with an ultra-high finesse optical cavity ($\mathcal{F}$ = 637 000) and operating in the frequency-agile, rapid scanning spectroscopy (FARS) mode. Despite working in the Doppler-limited regime, we reached 40 kHz of statistical uncertainty and 161 kHz of absolute accuracy, achieving the highest accuracy for homonuclear isotopologues of molecular hydrogen. The accuracy of our measurement corresponds to the fifth significant digit of the leading term in QED correction. We observe 2.3$σ$ discrepancy with the recent theoretical value.
