Double-Electromagnetically-Induced-Transparency Ground-State Cooling of Stationary Two-Dimensional Ion Crystals.
Double-Electromagnetically-Induced-Transparency Ground-State Cooling of Stationary Two-Dimensional Ion Crystals.
复制标题
固定二维离子晶体的双电磁感应透明基态冷却。
DOI：
10.1103/physrevlett.126.023604
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发表时间：
2021
影响因子：
8.6
通讯作者：
Kihwan Kim
中科院分区：
文献类型：
--
作者：
Mu Qiao;Ye Wang;Zhen Cai;Botao Du;Pengfei Wang;Chunyang Luan;Wentao Chen;H. Noh;Kihwan Kim
本文从理论和实验上研究了Paul阱中二维离子晶体的双电磁感应透明冷却。对于具有时钟态的^{171}Yb^{+}离子，观察到双EIT基态冷却，对于这种离子，EIT冷却没有像许多其他具有简单Λ方案的离子那样实现。单离子的冷却速率为n[over <$][over stec]=34（±1.8）ms^{-1}，冷却极限为n[over <$]=0.06（±0.059）。测得的冷却速率和极限与理论预测一致。我们应用双EIT冷却的横向模式的二维（2D）晶体与多达12个离子。在我们的二维晶体中，微动和横模方向是垂直的，这使得它们解耦。因此，横向模上的冷却不受微动的干扰，这在我们的实验中得到了证实。对于12离子晶体的质心模式，我们观察到的冷却速率和冷却极限是一致的，与一个单一的离子，包括加热速率成比例的离子的数量。这种方法可以扩展到其他超精细量子比特，并且具有大量离子的静止2D晶体的近基态冷却可能会推进量子信息科学领域。
We theoretically and experimentally investigate double-electromagnetically-induced transparency (double-EIT) cooling of two-dimensional ion crystals confined in a Paul trap. The double-EIT ground-state cooling is observed for ^{171}Yb^{+} ions with a clock state, for which EIT cooling has not been realized like many other ions with a simple Λ scheme. A cooling rate of n[over ¯][over ˙]=34(±1.8) ms^{-1} and a cooling limit of n[over ¯]=0.06(±0.059) are observed for a single ion. The measured cooling rate and limit are consistent with theoretical predictions. We apply double-EIT cooling to the transverse modes of two-dimensional (2D) crystals with up to 12 ions. In our 2D crystals, the micromotion and the transverse mode directions are perpendicular, which makes them decoupled. Therefore, the cooling on transverse modes is not disturbed by micromotion, which is confirmed in our experiment. For the center of mass mode of a 12-ion crystal, we observe a cooling rate and a cooling limit that are consistent with those of a single ion, including heating rates proportional to the number of ions. This method can be extended to other hyperfine qubits, and near ground-state cooling of stationary 2D crystals with large numbers of ions may advance the field of quantum information sciences.