Research Progress Of Quantum Repeaters

Author:

Ruihong Qiao,Ying Meng

Abstract

Abstract At present, the main components of quantum communication channels are optical fibers and free space. However, whether it is a fiber channel or a free-space channel, the channel in which it propagates is affected by noise, resulting in loss or absorption of photons. Experimental studies have shown that the quantum key can basically meet the requirements of the local area network, and the safety distance is about 100km. However, if you want to achieve longer distance distribution, you can’t do without quantum repeaters. The quantum repeater can divide the long-distance communication distance into several segments, and then perform quantum key distribution in several segments respectively; then establish a longer-distance EPR pair between adjacent nodes, and establish an EPR pair to utilize entanglement switching and Entanglement purification technology; finally repeat the above steps, and finally achieve long-distance information transmission. The development of quantum repeaters can solve the communication problems facing the world and promote the replacement of global communication methods.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Reference6 articles.

1. Analysis of Quantum Key Distribution Network;Wu;Optical Communication Research,2009

2. Research on Grover routing algorithm in wireless self-organizing quantum communication network;Peng;Journal of Zhejiang University of Technology,2014

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