A Quantum Repeater Based on Entanglement Purification and Entanglement Swapping

Abstract:

We discuss a long-distance quantum communication system based on entangled photon pairs, which apply entanglement as its fundamental resource. For distances longer than the coherence length of a counterpart noisy quantum channel, the fidelity of transmission is ordinarily so low that standard purification processes are not applicable. The quantum repeater stretches the length of the entangled photon pairs. And the high fidelity entanglement of photons between sender and receiver is obtained by entanglement purification and entanglement swapping. We compare the nested repeater with the common repeater and show that it outperforms the latter, which is built an EPR pair in less time.

• Periodical: Applied Mechanics and Materials (Volume 302)
• Pages: 607-611
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.302.607
• Online since: February 2013
• Authors: Zhen Zhu Zhou, Wei He, Chun Dan Zhu, Ying Wang
• Keywords: Entanglement Purification, Entanglement Swapping, Quantum Communication System, Quantum Repeater

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