AI 中文总结
本研究提出基于路由和投影测量的方案，以最少元件实现通用线性幺正变换，推广至多光子散射玻色采样实验，且测试了其在损耗和相位噪声下的鲁棒性。
AI 中文摘要
具有N个端口的多端口干涉仪是经典和量子光子学中的基础器件，理想情况下可实现输入输出电场矢量间的线性幺正变换，该矢量含N个分量，每个分量对应经典相干光或单光子的空间模式。完全可重构通用多端口干涉仪的标准设计为Reck或Clements方案。本研究提出路由方案，通过对单个探测器进行多次投影测量，以最少的元件数量，利用线性或树形几何实现经典相干光或单光子的通用幺正变换；随后将该结果推广至多光子态的情况，适用于采用多路由方案的散射玻色采样实验；最后测试了路由方案相较于通用方案在损耗和相位噪声方面的鲁棒性。
英文摘要
Multiport interferometers with $N$ ports are basic devices in both classical and quantum photonics. Ideally, they implement a linear unitary transformation between the input and output electric field vectors with $N$ components, each associated with a spatial mode of classical coherent light or a single photon. Standard designs for a fully reconfigurable universal multiport interferometer are given by the Reck or the Clements schemes. In this work, we introduce routing schemes to implement a generic unitary transformation on classical coherent light or single photons using linear or tree geometries via multiple projective measurements on a single detector with the minimum number of components. Then, we generalize this result to the case of any multi-photon state for scattershot boson sampling experiments with multi-routing schemes. Finally, we test the robustness of routing schemes compared to universal schemes with respect to losses and phase noise.
Comments44 pages, 16 figures
