We propose a longitudinal Ramsey spectroscopy of atoms in a moving optical lattice. Spatially separated magnetic fields, which open the forbidden transition by mixing with the dipole-allowed states, create Ramsey pulses for a probe laser introduced along the optical lattice. Excitation of atoms in the Lamb-Dicke regime by a single probe laser avoids residual Doppler effects as well as mechanical instabilities that deteriorate Ramsey spectroscopy on an atomic beam. Continuous measurement and control of the probe laser improves the Allan deviation as τ ⁻¹ for an averaging time τ until the quantum projection noise limit is reached. For ⁸⁸Sr atoms with an atomic flux of 10⁴s⁻¹, we speculate a clock instability of 5נ10⁻¹⁶(τs⁻¹)⁻¹ down to its floor at around 10⁻¹⁸.

我们提出了移动光学晶格中原子的纵向拉姆齐光谱。空间分离的磁场通过与偶极子允许状态混合打开禁止跃迁，为沿光学晶格引入的探测激光产生拉姆齐脉冲。单个探针激光在 Lamb-Dicke 状态下激发原子避免了残留的多普勒效应以及使原子束上的拉姆齐光谱恶化的机械不稳定性。探测激光的连续测量和控制在平均时间τ内将艾伦偏差改善为τ ^-1直到达到量子投影噪声极限。对于^{88 个}Sr 原子，原子通量为 10 ⁴ s ^-1，我们推测 5נ10 ^-16 ( τ s ^-1 ) ^{-1的时钟不稳定性下降到大约 10 -18}的底部。