论文标题
Rydberg系列激发的单个被困的$^{40} $ ca $^+$ ion的电离能量的精确测量
Precision measurement of the ionization energy of a single trapped $^{40}$Ca$^+$ ion by Rydberg series excitation
论文作者
论文摘要
当使用被困离子的rydberg状态进行量子信息处理时，一组完整的光谱数据是必不可少的。我们对$ ns_ {1/2} $状态进行了Rydberg系列光谱，$ 38 \ leq n \ leq 65 $和$ nd_ {5/2} $ antent $ 37 \ leq n \ leq n \ leq n \ leq leq 50 $在单个被困$^{40} $ ca $ ca $^+$ $ yion上。从非线性回归到谐振频率，我们确定了2 870 575.582（15）GHz的电离能，与公认的值相比，其准确度高60倍，并以7.5标准偏差为单位。我们确认$δ_{s_ {1/2}} = 1.802995（5）$和$δ_{d_ {d_ {5/2}} = 0.626888（9）$ for $ ns_ {1/2} $和$ nd_ {5/2} $ rambigig，RAMBIG的级别的量子缺陷值Ca $^+$离子。
A complete set of spectroscopic data is indispensable when using Rydberg states of trapped ions for quantum information processing. We carried out Rydberg series spectroscopy for $nS_{1/2}$ states with $38 \leq n \leq 65$ and for $nD_{5/2}$ states with $37\leq n \leq 50$ on a single trapped $^{40}$Ca$^+$ ion. From a nonlinear regression to resonance frequencies, we determined the ionization energy of 2 870 575.582(15) GHz, measured 60 times more accurately as compared to the accepted value and contradicting it by 7.5 standard deviations. We confirm quantum defect values of $δ_{S_{1/2}}=1.802995(5)$ and $δ_{D_{5/2}}=0.626888(9)$ for $nS_{1/2}$ and $nD_{5/2}$ states respectively, which allow for unambiguous addressing of Rydberg levels of Ca$^+$ ions.
