Mu Wei-Lin, Li Xiao-Xuan, Shao Xiao-Qiang
Opt Lett. 2022 Sep 1;47(17):4491-4494. doi: 10.1364/OL.471591.
We propose a cooling scheme to prepare stationary entanglement of neutral atoms in the Rydberg blockade regime by the combination of periodically collective laser pumping and dissipation. In each cycle, the controlled unitary dynamics process can selectively pump atoms away from the nontarget state while keeping the target state unchanged. The subsequent dissipative process redistributes the populations of ground states through the engineered spontaneous emission. After a number of cycles, the system will eventually be stabilized into the desired steady state, independent of the initial state. This protocol does not rely on coherent addressing of individual neutral atoms or fine control of Rydberg interaction intensity, which can, in principle, greatly improve the feasibility of experiments in related fields.
我们提出了一种冷却方案，通过周期性集体激光泵浦和耗散相结合的方式，在里德堡阻塞区域制备中性原子的静态纠缠。在每个周期中，受控的幺正动力学过程可以选择性地将原子从非目标状态泵出，同时保持目标状态不变。随后的耗散过程通过设计的自发辐射重新分配基态的粒子数。经过多个周期后，系统最终将稳定到所需的稳态，而与初始状态无关。该方案不依赖于对单个中性原子的相干寻址或对里德堡相互作用强度的精细控制，原则上可以大大提高相关领域实验的可行性。
