论文标题
具有调制过渡频率的巨大原子
A giant atom with modulated transition frequency
论文作者
论文摘要
巨大原子以频率依赖性的自发发射和相关的干扰效应而闻名。在本文中，我们研究了具有动态调节频率的两级巨型原子的自发发射动力学。结果表明，由频率调制和延迟效应本身引起的动力学阶段，巨大原子系统的迟钝反馈效应大大改变了。有趣的是，这种修改反过来又可以抑制迟钝的反馈，从而使巨大原子的行为像小原子。通过在两个原子波导耦合路径之间引入附加的相位差，我们还证明了实现输出场的手性和可调的时间分布的可能性。本文中的结果在量子信息处理和量子网络工程中具有潜在的应用。
Giant atoms are known for the frequency-dependent spontaneous emission and associated interference effects. In this paper, we study the spontaneous emission dynamics of a two-level giant atom with dynamically modulated transition frequency. It is shown that the retarded feedback effect of the giant-atom system is greatly modified by a dynamical phase arising from the frequency modulation and the retardation effect itself. Interestingly, such a modification can in turn suppress the retarded feedback such that the giant atom behaves like a small one. By introducing an additional phase difference between the two atom-waveguide coupling paths, we also demonstrate the possibility of realizing chiral and tunable temporal profiles of the output fields. The results in this paper have potential applications in quantum information processing and quantum network engineering.
