物理学进展2017，Vol.37Issue(3)：98-118,21.DOI:10.13725/j.cnki.pip.2017.03.002
轨道角动量态的量子存储
Quantum storage of orbital angular momentum states
摘要
Abstract
Light carrying orbital angular momentum (OAM) has many exciting applications in the studies of fundamental quantum physics,optical manipulation and trapping of particles,astrophysics,high-precision optical measurements and optical communication both in classical and quantum fields,etc.In quantum information field,a photon encoded with information in its OAM degrees of freedom enables networks to carry significantly more information and increase their capacity greatly due to the inherent infinite degrees of freedom for OAM.In order to realize a long-distance quantum communication,quantum repeaters have to be used to overcome the problem of communication fidelity decreasing exponentially with the channel length for,where,quantum memories for photons,used for storing quantum information,are key components of a quantum repeater.So far,there are many works reporting on storing quantum states encoded in for example degree of polarization,path,time bin,etc,however,there have been very few works realizing the storage of OAM states.During the past years,our group has been focusing on the experimental realization of quantum memories for OAM states.In this review,after briefly introducing the main benchmarks for quantum memories,we will show a series of important progresses achieved along this research direction in our group,including the storage of OAM qubit and qutrit,of OAM entanglement in a two-dimensional and a high-dimensional space,of hyperentanglement and hybrid entanglement consisting of OAM and other degree of freedom.We believe that all results are very promising for realizing a high-dimensional quantum network in the future.关键词
量子存储/轨道角动量/量子存储/原子系综/量子信息Key words
quantum storage/orbital angular momentum (OAM)/quantum memory/atomic ensemble/quantum information分类
数理科学引用本文复制引用
史保森,丁冬生,张伟..轨道角动量态的量子存储[J].物理学进展,2017,37(3):98-118,21.基金项目
This work was supported by the National Fundamental Research Program of China (Grant No.2011CBA00200),the National Natural Science Foundation of China (Grant Nos.11174271,61275115,61435011,61525504). （Grant No.2011CBA00200）
