论文标题
使用光子路径和极化的通用量子状态转换的优化结构
Optimized architectures for universal quantum state transformations using photonic path and polarization
论文作者
论文摘要
高维量子空间中的任意无损转换可以分解为易于实施的基本操作，而有效的分解算法对于构建高维系统很重要。在这里，我们提出了两个优化的体系结构，以使用基于现有的分解算法的光子路径和极化有效地实现任意统一转换。在第一个体系结构中，与以前的作品相比，所需的干涉仪的数量减少了一半。在第二个体系结构中，通过使用高维X门，所有基本操作都转移到在同一路径中局部作用于光子极化的操作。这种架构在基于极化的应用中可能具有重要意义。两种体系结构都保持对称布局。我们的工作促进了高维转换的光学实施，并且可能在高维量子计算和量子通信中具有潜在的应用。
An arbitrary lossless transformation in high-dimensional quantum space can be decomposed into elementary operations which are easy to implement, and an effective decomposition algorithm is important for constructing high-dimensional systems. Here, we present two optimized architectures to effectively realize an arbitrary unitary transformation by using the photonic path and polarization based on the existing decomposition algorithm. In the first architecture, the number of required interferometers is reduced by half compared with previous works. In the second architecture, by using the high-dimensional X gate, all the elementary operations are transferred to the operations which act locally on the photonic polarization in the same path. Such an architecture could be of significance in polarization-based applications. Both architectures maintain the symmetric layout. Our work facilitates the optical implementation of high-dimensional transformations and could have potential applications in high-dimensional quantum computation and quantum communication.
