Kaewuam R, Tan T R, Arnold K J, Chanu S R, Zhang Zhiqiang, Barrett M D
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore.
Department of Physics, National University of Singapore, 2 Science Drive 3, 117551 Singapore.
Phys Rev Lett. 2020 Feb 28;124(8):083202. doi: 10.1103/PhysRevLett.124.083202.
We propose and experimentally demonstrate a scheme that realizes hyperfine averaging during a Ramsey interrogation of a clock transition. The method eliminates the need to average over multiple optical transitions, reduces the sensitivity of the clock to its environment, and reduces inhomogeneous broadening in a multi-ion clock. The method is compatible with autobalanced Ramsey spectroscopy, which facilitates the elimination of residual shifts due to imperfect implementation and ac stark shifts from the optical probe. We demonstrate the scheme using correlation spectroscopy of the ^{1}S_{0}↔^{3}D_{1} clock transition in a three-ion Lu^{+} clock. From the demonstration we are able to provide a measurement of the ^{3}D_{1} quadrupole moment, Θ(^{3}D_{1})=0.634(9)ea_{0}^{2}.
我们提出并通过实验证明了一种在时钟跃迁的拉姆齐询问期间实现超精细平均的方案。该方法无需对多个光学跃迁进行平均，降低了时钟对其环境的敏感度，并减少了多离子时钟中的非均匀展宽。该方法与自动平衡拉姆齐光谱兼容，这有助于消除由于不完善的实现导致的残余频移以及光学探针引起的交流斯塔克频移。我们使用三离子镥离子时钟中(^{1}S_{0}\leftrightarrow^{3}D_{1})时钟跃迁的相关光谱来演示该方案。通过该演示，我们能够提供(^{3}D_{1})四极矩的测量值，(\Theta(^{3}D_{1}) = 0.634(9)ea_{0}^{2})。
