Wang Fang-Xiang, Wu Juan, Chen Wei, Yin Zhen-Qiang, Wang Shuang, Guo Guang-Can, Han Zheng-Fu
Opt Lett. 2018 Jan 15;43(2):349-352. doi: 10.1364/OL.43.000349.
Phase manipulation is essential to quantum information processing, for which the orbital angular momentum (OAM) of photon is a promising high-dimensional resource. Dove prism (DP) is one of the most important elements to realize the nondestructive phase manipulation of OAM photons. DP usually changes the polarization of light and thus increases the manipulation error for a spin-OAM hybrid state. DP in a Sagnac interferometer also introduces a mode-dependent global phase to the OAM mode. In this work, we implemented a high-dimensional controlled-phase manipulation module (PMM), which can compensate the mode-dependent global phase and thus preserve the phase in the spin-OAM hybrid superposition state. The PMM is stable for free running and is suitable to realize the high-dimensional controlled-phase gate for spin-OAM hybrid states. Considering the Sagnac-based structure, the PMM is also suitable for classical communication with the spin-OAM hybrid light field.
相位操纵对于量子信息处理至关重要，为此光子的轨道角动量（OAM）是一种很有前景的高维资源。 Dove棱镜（DP）是实现OAM光子无损相位操纵的最重要元件之一。DP通常会改变光的偏振，从而增加自旋 - OAM混合态的操纵误差。Sagnac干涉仪中的DP还会给OAM模式引入一个与模式相关的全局相位。在这项工作中，我们实现了一个高维受控相位操纵模块（PMM），它可以补偿与模式相关的全局相位，从而在自旋 - OAM混合叠加态中保持相位。该PMM自由运行时稳定，适用于实现自旋 - OAM混合态的高维受控相位门。考虑到基于Sagnac的结构，该PMM也适用于与自旋 - OAM混合光场的经典通信。
