论文标题
通用线性光学器件的最佳模块化体系结构
Optimal modular architectures for universal linear optics
论文作者
论文摘要
我们提出了模块化和最佳体系结构，用于在灯光下实施任意离散的统一转换。这些体系结构基于系统地将较小的M模式线性光学干涉仪组合在一起以实现较大的N模式转换。因此，这项工作可以使用在空间或内部自由度（例如极化，时间或轨道角动量）上作用的较小的模块来实现大型线性光学转换。体系结构导致矩形门结构，这在实现这些体系结构上的任意转换的意义上是最佳的，需要最少数量的光学元素和最小的电路深度。此外，矩形结构可确保每种不同的光学模式产生平衡的光损失，因此与现有方案相比，体系结构有望大大增强工艺保真度。
We present modular and optimal architectures for implementing arbitrary discrete unitary transformations on light. These architectures are based on systematically combining smaller M-mode linear optical interferometers together to implement a larger N-mode transformation. Thus this work enables the implementation of large linear optical transformations using smaller modules that act on the spatial or the internal degrees of freedom of light such as polarization, time or orbital angular momentum. The architectures lead to a rectangular gate structure, which is optimal in the sense that realizing arbitrary transformations on these architectures needs a minimal number of optical elements and minimal circuit depth. Moreover, the rectangular structure ensures that each the different optical modes incur balanced optical losses, so the architectures promise substantially enhanced process fidelities as compared to existing schemes.
