论文标题
长寿命的圆形rydberg状态在低温恒温器中的激光冷却rubidium原子
Long-lived circular Rydberg states of laser-cooled Rubidium atoms in a cryostat
论文作者
论文摘要
Rydberg水平的精致特性使它们特别吸引了新兴的量子技术。然而，通过光学过渡和微波黑体辐射（BBR）在室温下引起的转移，低角度激光访问的寿命限于几美元，少数$ 100 \，μ\ mathrm {s} $。在低温环境中，圆形rydberg水平的$ 10 \，\ mathrm {MS} $寿命可获得可观的改进，从而降低了BBR温度。我们证明了低寿命的rydberg水平在低温恒温器中的激光冷却rubidium原子的制备。我们观察到$ 3.7 \，\ mathrm {MS} $ lifetime the principal量子数$ n = 52 $的循环级别。通过监视相邻的循环级别之间的转移，我们在原位估计微波bbr温度为$（11 \ pm 2）\，\ mathrm {k} $。测得的原子相干时间（$ 270 \，μ\ Mathrm {s} $）仅受技术磁场波动的限制。这项工作为量子模拟和感测的感测有趣的观点带来了有趣的观点。
The exquisite properties of Rydberg levels make them particularly appealing for emerging quantum technologies. The lifetime of low-angular-momentum laser-accessible levels is however limited to a few $100\,μ\mathrm{s}$ by optical transitions and microwave blackbody radiation (BBR) induced transfers at room temperature. A considerable improvement would be obtained with the few $10\,\mathrm{ms}$ lifetime of circular Rydberg levels in a cryogenic environment reducing the BBR temperature. We demonstrate the preparation of long-lived circular Rydberg levels of laser-cooled Rubidium atoms in a cryostat. We observe a $3.7\,\mathrm{ms}$ lifetime for the circular level of principal quantum number $n=52$. By monitoring the transfers between adjacent circular levels, we estimate in situ the microwave BBR temperature to be $(11\pm 2)\,\mathrm{K}$. The measured atomic coherence time ($270\,μ\mathrm{s}$) is limited here only by technical magnetic field fluctuations. This work opens interesting perspectives for quantum simulation and sensing with cold circular Rydberg atoms.
