论文标题
$^{87} $ rb和$^{133} $ cs的准备工作处于单个光学镊子的运动状态
Preparation of $^{87}$Rb and $^{133}$Cs in the motional ground state of a single optical tweezer
论文作者
论文摘要
我们报告单个$^{87} $ rb原子的同时拉曼边带冷却和分别位于814 \，nm和938 \，nm的单独光学镊子中的单个$^{133} $ cs原子。从Lamb-Dicke制度外部开始，在45 \冷却后，我们测量概率，以占用RB的三维运动接地状态为0.86 $^{+0.03} _ { - 0.04} $ RB，0.95 $^{+0.03} _ {+0.03} _ { - 0.04} $ for Cs for Cs for Cs for Cs。我们的设置与用来冷却RB和CS的拉曼激光光束重叠，通过沿着同一梁路径共享设备来减少硬件要求。冷却协议是可扩展的，我们证明了四个镊子阵列中单个RB原子的冷却。经过运动状态冷却后，一个938 \，NM Tweezer被翻译为与814 \，NM Tweezer重叠，因此可以将单个RB和单个CS原子转移到一个常见的1064 \，NM陷阱中。通过最大程度地减少合并和转移期间的加热，我们以相对运动基态的原子效率为0.81 $^{+0.08} _ { - 0.08} $。这是朝着光学镊子阵列中的单个RBCS分子形成的至关重要的步骤。
We report simultaneous Raman sideband cooling of a single $^{87}$Rb atom and a single $^{133}$Cs atom held in separate optical tweezers at 814\,nm and 938\,nm, respectively. Starting from outside the Lamb-Dicke regime, after 45\,ms of cooling we measure probabilities to occupy the three-dimensional motional ground state of 0.86$^{+0.03}_{-0.04}$ for Rb and 0.95$^{+0.03}_{-0.04}$ for Cs. Our setup overlaps the Raman laser beams used to cool Rb and Cs, reducing hardware requirements by sharing equipment along the same beam path. The cooling protocol is scalable, and we demonstrate cooling of single Rb atoms in an array of four tweezers. After motional ground-state cooling, a 938\,nm tweezer is translated to overlap with a 814\,nm tweezer so that a single Rb and a single Cs atom can be transferred into a common 1064\,nm trap. By minimising the heating during the merging and transfer, we prepare the atoms in the relative motional ground state with an efficiency of 0.81$^{+0.08}_{-0.08}$. This is a crucial step towards the formation of single RbCs molecules confined in optical tweezer arrays.
