Jin Zhao, Gong Wei-Jiang, Zhu Ai-Dong, Zhang Shou, Qi Yang, Su S-L
Opt Express. 2021 Mar 29;29(7):10117-10133. doi: 10.1364/OE.419568.
We propose a mechanism of Rydberg double antiblockade by virtue of a resonant dipole-dipole interaction between a pair of Rydberg atoms placed at short distances scaling as 1/R. By combining this novel excitation regime with microwave-driven fields and dissipative dynamics, a stationary qutrit entangled state can be obtained with high quality, the corresponding steady-state fidelity and purity are insensitive to the variations of the dynamical parameters. Furthermore, we introduce time-dependent laser fields with periodically modulated amplitude to speed up the entanglement creation process. Numerical simulations reveal that the order of magnitude of the shortened convergence time is about 10 in units of ω, and the acceleration effect appears valid in broad parametric space. The present results enrich the physics of the Rydberg antiblockade regimes and may receive more attention for the experimental investigations in dissipative dynamics of neutral atoms.
我们提出了一种里德堡双反阻塞机制，该机制基于一对近距离放置的里德堡原子之间的共振偶极 - 偶极相互作用，其相互作用强度按1/R缩放。通过将这种新型激发机制与微波驱动场和耗散动力学相结合，可以高质量地获得一个稳态三量子比特纠缠态，相应的稳态保真度和纯度对动力学参数的变化不敏感。此外，我们引入具有周期性调制幅度的含时激光场来加速纠缠产生过程。数值模拟表明，以ω为单位，缩短的收敛时间的数量级约为10，并且在广泛的参数空间中加速效应都是有效的。目前的结果丰富了里德堡反阻塞机制的物理内容，可能会在中性原子的耗散动力学实验研究中受到更多关注。
