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24 April 2024

» arxiv » quant-ph/0508062

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Quantum-Relay-Assisted Key Distribution over High Photon Loss Channels
An-Ning Zhang ; Yu-Ao Chen ; Chao-Yang Lu ; Xiao-Qi Zhou ; Zhi Zhao ; Qiang Zhang ; Tao Yang ; Jian-Wei Pan ;
Date:	7 Aug 2005
Subject:	quant-ph
Abstract:	The maximum distance of quantum communication is limited due to the photon loss and detector noise. Exploiting entanglement swapping, quantum relay could offer ways to extend the achievable distance by increasing the signal to noise ratio. In this letter we present an experimental simulation of long distance quantum communication, in which the superiority of quantum relay is demonstrated. Assisted by quantum relay, we greatly extend the distance limit of unconditional secure quantum communication.
Source:	arXiv, quant-ph/0508062
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