论文标题
通过自我干扰对集体自发排放的一致控制
Coherent Control of Collective Spontaneous Emission through Self-interference
论文作者
论文摘要
作为量子光学元件的中心主题之一，在各种系统中已经实现了集体自发发射（例如超级发射）。这项工作提出了一种创新的方案，可以通过非线性波导环境中的自我干扰机制连贯控制集体排放率。通过作为量子开关工作的波导中的量子散射体产生的光子向后散射使自我干扰成为可能。是否发现干扰是建设性的还是破坏性的，这在很大程度上取决于散点子和发射器之间的距离。相同光子的两个传播途径之间的干扰导致可控的超沉载和次级缩减，其集体衰减率大大提高或抑制（也导致过度利益或人口陷阱）。此外，自我干扰机制是由实时的突然变化而表现出来的。进一步提出了基于超导传输线谐振器和Transmon Qubit的实验设置，以实现可控制的集体排放率。
As one of the central topics in quantum optics, collective spontaneous emission such as superradiance has been realized in a variety of systems. This work proposes an innovative scheme to coherently control collective emission rates via a self-interference mechanism in a nonlinear waveguide setting. The self-interference is made possible by photon backward scattering incurred by quantum scatterers in a waveguide working as quantum switches. Whether the interference is constructive or destructive is found to depend strongly on the distance between the scatterers and the emitters. The interference between two propagation pathways of the same photon leads to controllable superradiance and subradiance, with their collective decay rates much enhanced or suppressed (also leading to hyperradiance or population trapping). Furthermore, the self-interference mechanism is manifested by an abrupt change in the emission rates in real time. An experimental setup based on superconducting transmission line resonators and transmon qubits is further proposed to realize controllable collective emission rates.
