利用弱测量原理测量轨道角动量光束的拓扑电荷

Measuring the Topological Charge of Orbital Angular Momentum Beams by Utilizing Weak Measurement Principle.

作者信息

Zhu Jing, Zhang Pei, Li Qichang, Wang Feiran, Wang Chenhui, Zhou Yingnan, Wang Jinwen, Gao Hong, Kwek Leong Chuan, Li Fuli

机构信息

Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Science, Xi'an Jiaotong University, Xi'an, 710049, China.

Center for Quantum Technologies, National University of Singapore, Singapore, 117543, Singapore.

出版信息

Sci Rep. 2019 May 29;9(1):7993. doi: 10.1038/s41598-019-44465-z.

DOI:10.1038/s41598-019-44465-z

PMID:31142778

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6541590/

Abstract

According to the principle of weak measurement, when coupling the orbital angular momentum (OAM) state with a well-defined pre-selected and post-selected system of a weak measurement process, there will be an indirect coupling between position and topological charge (TC) of OAM state. Based on this we propose an experiment scheme and experimentally measure the TC of OAM beams from -14 to 14 according to the weak measurement principle. After the experiment the intrinsic OAM of the beams changed very little. Weak measurement, Topological Charge, OAM beams.

摘要

根据弱测量原理，当将轨道角动量（OAM）态与弱测量过程中一个明确预选择和后选择的系统耦合时，OAM态的位置与拓扑电荷（TC）之间会存在间接耦合。基于此，我们提出了一种实验方案，并根据弱测量原理对-14到14的OAM光束的TC进行了实验测量。实验后光束的固有OAM变化很小。弱测量、拓扑电荷、OAM光束。