A quantum memory for high-dimensional states

Abstract

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

CLC Number:

O431.2

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

References

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