AI 中文总结
研究在超高真空玻璃池单个铷原子三光子里德堡激发，利用八个电极产生电场，通过三光子方案同时观测斯塔克位移和分裂，能独立调谐电场并补偿杂散场，结果与理论相符，对里德堡静电测量有意义。
AI 中文摘要
量子计算和量子模拟需要对原子阵列中的单个原子进行里德堡激发，而里德堡态对外部电场极为敏感，精确的三维电场控制至关重要。我们在外部直流电场存在的情况下，对光偶极阱中的单个铷原子进行了三光子里德堡激发的光谱研究。电场由沉积在超高真空玻璃池内表面的八个电极产生。所采用的三光子激光激发里德堡\textit{nP}态的方案能够同时观测到斯塔克位移和共振分裂，简化了电场校准。此外，常用的双光子里德堡激发方案中，光频移会使直流斯塔克位移的精确测定复杂化，而我们实验中的三光子激发方案不存在这些频移。我们展示了沿所有三个空间方向独立调谐电场并补偿杂散电场的能力。测量的三光子光谱显示出三光子共振的斯塔克位移和分裂，与理论计算结果高度吻合。这些结果对里德堡静电测量也具有重要意义。
英文摘要
Quantum computing and quantum simulation with ultracold neutral atoms require Rydberg excitation of individual atoms in atomic arrays. Rydberg states are extremely sensitive to external electric fields, therefore precise three-dimensional control of the electric field is essential. We performed a spectroscopic study of three-photon Rydberg excitation of a single Rb atom in an optical dipole trap in the presence of an external DC electric field. The field was generated by eight electrodes deposited on the inner surfaces of an ultrahigh-vacuum glass cell. The used three-photon scheme of laser excitation of Rydberg \textit{nP} states allows the Stark shift and the splitting of the resonances to be observed simultaneously, which simplifies calibration of the electric field. In addition, in the commonly used two-photon Rydberg excitation schemes, the light shifts can complicate accurate determination of the DC Stark shift, particularly when the external electric field is scanned across different spatial directions, and different Stark components are excited. These shifts are absent in the three-photon excitation scheme used in our experiment. We demonstrated the ability to independently tune the electric field along all three spatial directions and to compensate for stray electric fields. The measured three-photon spectra exhibit Stark shifts and splittings of the three-photon resonance that are in good agreement with theoretical calculations. These results are also of interest for Rydberg electrometry.
Comments13 pages, 9 figures
