高维量子态存储

摘要/Abstract

摘要： 量子通信网络主要由用于存储和操纵量子态的存储单元和联络存储单元之间的信息载体构成。光子是信息载体的最佳选择，存储单元可以由固态材料或气态原子组成。相对于二维空间，编码于一个高维空间的光子可以携带更大的信息量。若能够实现编码于高维空间的量子态存储，则在增大存储单元存储容量的同时，还可以提高网络的信道容量和传输效率，因而高维量子态的存储研究成为当前量子信息领域的热点领域。本文简要回顾了国内外在高维量子态存储方面进展,着重介绍了近期基于冷原子系综实现单光子条件下高维量子态存储的突破性进展，提出了构建高维量子网络需要解决的关键问题。

关键词: 量子光学；量子存储器；高维编码态；轨道角动量；存储

Abstract: Quantum network mainly consists of a memory used for storing and manipulating quantum information and an information carrier through which different memories could connect with others. Usually quantum information is encoded in a two-dimensional space of a photon, a robust information carrier. In this case, each photon could carry a bit of information. If the photon could live in a high-dimensional space, then the information carried by each photon could be increased significantly, the channel capacity of the network and the transmission efficiency would then be greatly enlarged. Moreover, storing high-dimensional states in quantum memory leads to significant improvements in storage capacity. After briefly introducing the progresses achieved at home and abroad, we review a significant breakthrough towards the realization of high-dimensional quantum memories based on a cold atomic ensemble in detail, and show some basic problems remaining which need to be solved to build the future quantum internet.

Key words: quantum optics；quantum memory; quantum state encoded in a high-dimensional space; orbital angular momentum; storage

中图分类号:

O431.2

丁冬生，周志远，史保森. 高维量子态存储[J]. J4, 2014, 31(4): 442-448.

Ding Dong-Sheng ，Zhou Zhi-Yuan, Shi Bao-Sen . A quantum memory for high-dimensional states[J]. J4, 2014, 31(4): 442-448.

参考文献

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