论文标题
子恢复时钟转换激光冷却使浅光学晶格时钟
Sub-recoil clock-transition laser cooling enabling shallow optical lattice clocks
论文作者
论文摘要
激光冷却是在各种设置中对原子系统进行量子控制的关键要素。在二价原子中，通常使用两阶段的多普勒冷却来将原子带到英国政权。在这里，我们使用UltranArrow 1S0-3P0时钟过渡实现了脉冲径向冷却方案，以实现以下nk的亚恢复温度。以及沿一维晶格轴的侧带冷却，我们以6个晶格后坐力的能量有效地在浅晶格中制备原子。在这些条件下，晶格时钟精度的关键限制降低了，为改进的大门打开了大门。此外，浅层晶格中的隧道偏移不会在10-19级别折衷时钟精度。
Laser cooling is a key ingredient for quantum control of atomic systems in a variety of settings. In divalent atoms, two-stage Doppler cooling is typically used to bring atoms to the uK regime. Here, we implement a pulsed radial cooling scheme using the ultranarrow 1S0-3P0 clock transition in ytterbium to realize sub-recoil temperatures, down to tens of nK. Together with sideband cooling along the one-dimensional lattice axis, we efficiently prepare atoms in shallow lattices at an energy of 6 lattice recoils. Under these conditions key limits on lattice clock accuracy and instability are reduced, opening the door to dramatic improvements. Furthermore, tunneling shifts in the shallow lattice do not compromise clock accuracy at the 10-19 level.
