论文标题
连续拉曼边带冷却在被困的离子链中的羔羊dicke政权之外
Continuous Raman sideband cooling beyond the Lamb-Dicke Regime in a trapped ion chain
论文作者
论文摘要
我们报告了长离子链的连续拉曼边带冷却（CRSC）与羔羊dicke（LD）制度之外的运动基态。通过同时驱动多个边带转换，我们表明，几乎所有24-ION链的轴向模式都冷却至基态，LD参数较大至$η= 1.3 $，跨越4 MHz的频率带宽。与传统的地面冷却方法（例如脉冲边带冷却或电磁诱导的透明度（EIT）冷却）相比，我们的方法提供了两个关键优势：定时误差的鲁棒性；和超宽的带宽无限的离子数量。该技术是使用线性离子链和更高尺寸的大规模量子信息处理的关键步骤，并且可以很容易地将其推广到其他原子和分子系统。
We report continuous Raman sideband cooling (CRSC) of a long ion chain to the motional ground state beyond the Lamb-Dicke (LD) regime. By driving multiple sideband transitions simultaneously, we show that nearly all axial modes of a 24-ion chain are cooled to the ground state, with an LD parameter as large as $η= 1.3$, spanning a frequency bandwidth of 4 MHz. Compared to traditional ground-state cooling methods such as pulsed sideband cooling or electromagnetic-induced-transparency (EIT) cooling, our method offers two key advantages: robustness to timing errors; and an ultra-wide bandwidth unlimited by the number of ions. This technique contributes as a crucial step for large-scale quantum information processing with linear ion chains and higher dimensions alike, and can be readily generalized to other atomic and molecular systems.
